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Project reporting in FP6
Project no. 044339
CONSTGLASS
Conservation materials for stained glass windows – assessment of treatments, studies on reversibility and performance of innovative restoration strategies and products
Specific Targeted Research Project
FP 6 Thematic Priority 8.1: Policy-oriented research
Object data Part IV of IV
The Burrell Collection, Glasgow (Scotland) Burgdorf (Canton Bern, Switzerland)
Academy of Fines Arts, Krakow (Poland)
CONSTGLASS
Data sheet for pilot objects
Cecily Page 1 of 11
Object: Princess Cecily panel Date: June 2010
OBJECT IDENTIFICATION
Site Burrell Collection, Glasgow
Building Burrell Collection
Location and orientation of the window Plan of the building
In storage
Description of the window opening (dimensions, number of lights; photo, test panel marked)
Not relevant
Date c. 1483
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Data sheet for pilot objects
Cecily Page 2 of 11
Short description of the window (identification of subject, artist, workshop)
This small rectangular panel, c.1483, now part of the Burrell Collection, was originally placed at the bottom of the Royal Window in the north-west transept of Canterbury Cathedral, beside the donor-portraits of her parents (Edward IV and Elizabeth Woodville), her two brothers and four sisters, who were alive when the window was being made. On 13 December 1643, following Ordinances issued in parliament earlier that year the window was razed to the ground. The Cecily panel survived and was eventually purchased by Sir William Burrell. The panel was restored in 1975: the photographs, taken in 2010, show the panel in its present condition.
Owner City of Glasgow
Person(s) in charge Director, Glasgow Museums
Investigated panel (inventory number CVMA number, size)
Princess Cecily (Burrell Collection, Glasgow. Reg. No. 45/75). 39.4cm x 29.8cm
Manufacturing technique
unpainted glazing
painted glazing x
oxide paint / grisaille paint inside x
oxide paint / grisaille paint outside
silver stain inside x
silver stain outside
transparent enamel inside
transparent enamel outside
.......................................
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Data sheet for pilot objects
Cecily Page 3 of 11
.......................................
Further information:
ENVIRONMENT IN SITU / IN STORAGE
Protective glazing
no protective glazing Not relevant
protective glazing
installed in the original position of the ancient panels
mounted to the outside (ancient panels stay in their original position)
no ventilation
internal ventilation
external ventilation
size of interspace between ancient panel and protective glazing
cm
ventilation slot at the top (size) cm
ventilation slot at the bottom (size) cm
date of installation
Further information:
CONSTGLASS
Data sheet for pilot objects
Cecily Page 4 of 11
Material protective glazing Not relevant
Surround materials and construction related materials
Not relevant
Museal exposition / Storage
Room
Cabinet
Store x
Further information:
Objects exposed to
partial sunlight
daylight, but no direct sunlight
artificial warmlight
artificial coldlight X
mixed warm-/coldlight
Previously exposed to artificial coldlight in Burrell Collection
CONSTGLASS
Data sheet for pilot objects
Cecily Page 5 of 11
Climate of the building
The building has a HVAC system
Further information / observations:
No data for period on display
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Data sheet for pilot objects
Cecily Page 6 of 11
INSPECTION OF THE SITE BEFORE REMOVAL (WITH PICTURES)
Requirements for a safe removal in respect of minimal intervention
Not relevant
Environmental causes for damage
Not relevant
Short report of removal
Not relevant
Short report of transport Not relevant
CONSTGLASS
Data sheet for pilot objects
Cecily Page 7 of 11
CONSERVATION MATERIAL
Conservation material (producer, product name, characterization, data, etc.)
Araldite AY103/HY951 epoxy resin supplied by Ciba Geigy Ltd.
Purpose of use consolidation of paint layer / paint pigments
coating / lamination
edge bonding x
gap-filling……………… x
………………
………………
Application technique
application with brush application with spray
single application
repeated application times
concentration %
mixing ration :
..........................
..........................
Further information :
Standard edge-bonding and gap-filling methods – but no precise documentation
CONSTGLASS
Data sheet for pilot objects
Cecily Page 8 of 11
Date of application
1975
Documentation of this treatment
photographs (colour transparences, b&w prints, colour prints, digital images) x
written records x
diagrams x
data-files
...........................
...........................
Further information:
Do you think this documentation is
exact x
more or less reliable
Previous restorations (data, treatments, material)
Documentation indicates previous plating of broken fragments with several stop-gaps
Do you think the information is
exact more or less reliable x hearsay
CONSTGLASS
Data sheet for pilot objects
Cecily Page 9 of 11
CONDITION REPORT / DOCUMENTATION IN THE WORKSHOP
Pictures of panel / glass in transmitted light
Pictures of panel / glass in reflecting and raking light, internal and external surface
Examination of the object (if possible with microscope)
Study focused on repair materials only – they showed excellent durability after 35 years.
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Data sheet for pilot objects
Cecily Page 10 of 11
Selected damages
Filled (1 and 2 above, 3 below) and bonded (3 above) areas showing good appearance after 35 years
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Data sheet for pilot objects
Cecily Page 11 of 11
Selection and documentation of samples to be analysed Questions to the scientists
Not relevant
Selection and documentation of areas for reversibility tests or reactivation tests
Not relevant
RESPONSIBLE CONSERVATORS (name, phone, e-mail)
Person 1
Marie Stumpff (Marie.Stumpff@csglasgow.org) – responsible conservator at the Burrell Collection
Person 2
Norman Tennent (normantennent @yahoo.co.uk) – involved with examination
Person 3
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Data sheet for pilot objects
ObjectData Burgdorf Fragment Page 1 of 16
Object: REF. PARISH CHURCH, TEST - GLASS Date: 12.01.2009
OBJECT IDENTIFICATION
Site Burgdorf BE (Switzerland)
Building Ref. Parish Church
Location and orientation of the window Plan of the building
Vestry south of the choir
Description of the window opening (dimensions, number of lights; photo, test panel marked)
Panel of fragments
Total height: ca. 79 cm Total width: ca. 40 cm
The panels have been installed in the sacristy about in 1971.
Date Panel of fragments: 1st decade of 16th century
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Data sheet for pilot objects
ObjectData Burgdorf Fragment Page 2 of 16
Short description of the window (identification of subject, artist, workshop)
The original window of the late 15th or early 16th century has been destroyed by a hailstorm in 1707. The fragments of the panel have been found in 1968 behind the choir stalls. Konrad Vetter mounted the fragments in 1971 for the vestry.
Owner Ref. parish church of Burgdorf
Person(s) in charge Vitrocentre Romont, Stefan Trümpler / Aline Dold
Investigated panel (inventory number CVMA number, size)
Manufacturing technique
unpainted glazing
painted glazing
oxide paint / grisaille paint inside
oxide paint / grisaille paint outside
silver stain inside
silver stain outside
transparent enamel inside
transparent enamel outside
flashed glass relief
.......................................
Further information:
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Data sheet for pilot objects
ObjectData Burgdorf Fragment Page 3 of 16
ENVIRONMENT IN SITU / IN STORAGE
Protective glazing
no protective glazing
protective glazing
installed in the original position of the ancient panels
mounted to the outside (ancient panels stay in their original position)
no ventilation
internal ventilation
external ventilation
size of interspace between ancient panel and protective glazing
ca. 4 cm
ventilation slot at the top (size) cm
ventilation slot at the bottom (size) cm
date of installation ca. 1971
Further information:
No data logger is necessary for this case.
There is no ventilation between the protective glazing and the panel, but there may have been a slight air exchange through the framing and the leaded panel.
Clear evidence for thermal damage due to the double-glazing.
Influence of acid from the oak frames is highly probable in the interspaces.
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Fragment Page 4 of 16
Material protective glazing
Transparent float glass
Surround materials and construction related materials
The building material is sandstone.
Around the panel: Oak-timber frame with saddle bars.
On the fragment panel we found some blurs of white paint (could be wall paint).
Museal exposition / Storage
Room
Cabinet
Store
Further information:
The vestry is a small room of about 25 square meters with a carpet.
Two artificial warm light lamps (filament lamps) on the walls, one of them between the test panels, about 100cm distance.
Objects exposed to
partial sunlight
daylight, but no direct sunlight
artificial warmlight
artificial coldlight
mixed warm-/coldlight
Note:
Filament lamps
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Fragment Page 5 of 16
Climate of the building
The climate in the vestry of the parish church is rather humid and moderately heated. The wall shows signs of humidity, at some places the wall plaster is peeling off. Occasionally, condensation occurs in the inter space of the glazing, leaving marks on the window frames. (Pict. 2).
On the day of the removal, 7th November 2007, the temperature was 14 0C / 57%rh (inside-), 10 0C / 80%rh (outside the sacristy).
Picture 1
Picture 2
Further information / observations: records of previously collected data, for example
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Fragment Page 6 of 16
INSPECTION OF THE SITE BEFORE REMOVAL (WITH PICTURES)
Requirements for a safe removal in respect of minimal intervention
The object has been transported horizontally and has not been touched at any time on its surface.
The window level is about 130 cm off the ground.
Environmental causes for damage
The panel is slightly bending due to heat dilatation. A small timber wedge had been applied under the lower lead bar, which caused a deformation of the panel.
The objects are exposed to UV-Light, through a 3mm-float glass.
Around the fragments, K. Vetter used some glass colored with manganese. This glass has changed color (to violet), according to its exposure to UV. The upper border, which has certainly less sunlight, is less affected.
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Fragment Page 7 of 16
Short report of removal
The panel was fixed in a timber frame with wooden strips.
For an easy removal, the front frame holding the protective glazing was fixed with two screws. The wooden strips around the glass panel were fixed with nails.
Two iron bars are fixed on the outside of the panel.
There is sawdust in the inter space.
Outside of the protective glazing, protective ferramenta.
Short report of transport The objects have been transported in a timber frame with Styrofoam and neutral cotton/molton tissue.
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Fragment Page 8 of 16
CONSERVATION MATERIAL
Conservation material (producer, product name, characterization, data, etc.)
Araldite® binder AY103 by 100 parts, hardener HY951 by 9 parts (Astorit AG 8840 Einsiedeln). Hardening at 22 0C during 24h.
Purpose of use
consolidation of paint layer / paint pigments
coating / lamination / doubling
edge bonding
………………
………………
………………
Application technique
application with brush
application with spray
single application
repeated application yes
concentration %
mixing ration of Araldite® AY103 / HY951 100:9
..........................
..........................
Further information :
According to documents of Konrad Vetter, the fragments have probably been thoroughly cleaned, especially on the unpainted backside. Single fractures were scotch taped on the painted surface (A). Then the crack was opened for inserting the Araldite® (B). The remaining Araldite® was removed with acetone.
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Fragment Page 9 of 16
For thin fragments (1-1.5mm) with multiple fractures, the simple edge bonding was not considered to be sufficient. The doubling method was used. A thin carrier glass was cut and sometimes reheated in a plaster mould taken from the original fragment. Araldite® was poured on the carrier glass, the fragment was then put on top and left under pressure with a weight, for 24 hours/22 °C. The resin coming out all around the doubled glass has been removed with a sharp blade after 6-7 hours.
original glass
araldite
carrier glass
Date of application
About 1971
Documentation of this treatment
photographs (colour transparences, b&w prints, colour prints, digital images)
written records
diagrams
data-files
...........................
...........................
Further information:
The written records of the methods used by the restorer K. Vetter are kept in the archives of the Vitrocentre and are analyzed for the project. Oral recordings are also be available
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Data sheet for pilot objects
ObjectData Burgdorf Fragment Page 10 of 16
The (identical) treatment of the second panel has been documented with photographs in 1971
Do you think this documentation is
Exact more or less reliable
Previous restorations (data, treatments, material)
.
Do you think the information is
exact more or less reliable hearsay
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Fragment Page 11 of 16
CONDITION REPORT / DOCUMENTATION IN THE WORKSHOP
Pictures of panel / glass in transmitted light
Lighting: Fluorescent tube inside the workbench (Lumilux Daylight). All digital photos in this data sheet : Nikon D-90
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Data sheet for pilot objects
ObjectData Burgdorf Fragment Page 12 of 16
Pictures of panel / glass in reflecting and raking light, internal and external surface
Pictures of panel in reflecting and raking light, internal surface.
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Data sheet for pilot objects
ObjectData Burgdorf Fragment Page 13 of 16
Pictures of panel in reflecting light, external surface.
Examination of the Detailed phenomenological optical analysis will be performed.
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Data sheet for pilot objects
ObjectData Burgdorf Fragment Page 14 of 16
object (if possible with microscope)
Short: The glass is in stable condition. On the (laminated as well as open) external surfaces some pitting corrosion.
The paint is stable. Some paint loss.
The lead is a perfect condition. The putty is in a good condition.
The Araldite® is yellowing and in some places looses adhesion / flakes off, showing clearly different types of deterioration.
Selected damages
fragment without doubling / pitting corrosion
selected damages for samples / pitting corrosion in Araldite®
Selection and documentation of samples to be
Is there a difference between the pitting corrosion with Araldite® and without?
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Data sheet for pilot objects
ObjectData Burgdorf Fragment Page 15 of 16
analysed Questions to the scientists
What is the impact of the resin on the glass surface and panting?
Selection and documentation of areas for reversibility tests or reactivation tests
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Fragment Page 16 of 16
RESPONSIBLE CONSERVATORS (name, phone, e-mail)
Person 1 Stefan Trümpler
Phone: +41 26 652 18 34
e-mail: truempler.vitrail@bluewin.ch
Person 2
Aline Dold
phone: +41 79 662 90 38
e-mail: vitrail@bluewin.ch / info@atelierdold.ch
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Heraldic Page 1 of 17
Object: REF. PARISH CHURCH, TEST - GLASS Date: 12.01.2009
OBJECT IDENTIFICATION
Site Burgdorf BE (Switzerland)
Building Ref. Parish Church
Location and orientation of the window Plan of the building
Vestry south of the choir
Description of the window opening (dimensions, number of lights; photo, test panel marked)
Heraldic stained glass panel
Total height: ca. 79 cm Total width: ca. 40 cm
The panels have been installed in the sacristy about in 1971.
Date Heraldic stained glass panel: 1555
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Data sheet for pilot objects
ObjectData Burgdorf Heraldic Page 2 of 17
Short description of the window (identification of subject, artist, workshop)
The single stained glass panel bears the coat of arms and inscriptions of the brothers Niklaus II and Hans-Rudolf Manuel, well known Bernese glass-painters of the sixteenth century. The panel has been donated to the church in 1869. The stained glass panel is supposed to have been executed by Niklaus II Manuel.
Owner Ref. parish church of Burgdorf
Person(s) in charge Vitrocentre Romont, Stefan Trümpler and Aline Dold
Investigated panel (inventory number CVMA number, size)
Manufacturing technique
unpainted glazing
painted glazing
oxide paint / grisaille paint inside
oxide paint / grisaille paint outside
silver stain inside
silver stain outside
transparent enamel inside
transparent enamel outside
flashed glass relief
.......................................
Further information:
The transparent enamel has no back-plating glass.
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Heraldic Page 3 of 17
ENVIRONMENT IN SITU / IN STORAGE
Protective glazing
no protective glazing
protective glazing
installed in the original position of the ancient panels
mounted to the outside (ancient panels stay in their original position)
no ventilation
internal ventilation
external ventilation
size of interspace between ancient panel and protective glazing
ca. 4 cm
ventilation slot at the top (size) cm
ventilation slot at the bottom (size) cm
date of installation ca. 1971
Further information:
No data logger is necessary for this case.
There is no ventilation between the protective glazing and the panel, but there may have been a slight air exchange through the framing and the leaded panel.
Clear evidence for thermal damage due to the double-glazing.
Influence of acid from the oak frames is highly probable in the interspaces.
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Heraldic Page 4 of 17
Material protective glazing
Transparent float glass
Surround materials and construction related materials
The building material is sandstone.
Around the panel: Oak-timber frame with saddle bars.
On the fragment panel we found some blurs of white paint (could be wall paint).
Museal exposition / Storage
Room
Cabinet
Store
Further information:
The vestry is a small room of about 25 square meters with a carpet.
Two artificial warm light lamps (filament lamps) on the walls, one of them between the test panels, about 100 cm distance.
Objects exposed to
partial sunlight
daylight, but no direct sunlight
artificial warmlight
artificial coldlight
mixed warm-/coldlight
Note:
Filament lamps
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Heraldic Page 5 of 17
Climate of the building
The climate in the vestry of the parish church is rather humid and moderately heated. The wall shows signs of humidity, at some places the wall plaster is peeling off. Occasionally, condensation occurs in the inter space of the glazing, leaving marks on the window frames. (Pict. 2).
On the day of the removal, 7th November 2007, the temperature was 14°C / 57% rh (inside-), 10°C / 80% rh (outside the sacristy).
Picture 1
Picture 2
Further information / observations: records of previously collected data, for example
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Heraldic Page 6 of 17
INSPECTION OF THE SITE BEFORE REMOVAL (WITH PICTURES)
Requirements for a safe removal in respect of minimal intervention
The object has been transported horizontally and has not been touched at any time on its surface.
The window level is about 130 cm off the ground.
Environmental causes for damage
The panel is slightly bending due to heat dilatation. A small timber wedge had been applied under the lower lead bar, which caused a deformation of the panel.
The objects are exposed to UV-Light, through a 3 mm-float glass.
Around the fragments, K. Vetter used some glass coloured with manganese. This glass has changed colour (to violet), according to its exposure to UV. The upper border, which has certainly less sunlight, is less affected.
Short report of removal
The panel was fixed in a timber frame with wooden strips.
For an easy removal, the front frame holding the protective glazing was fixed with two screws. The wooden strips around the glass panel were fixed with nails.
Two iron bars are fixed on the outside of the panel.
There is sawdust in the inter space.
Outside of the protective glazing, protective ferramenta.
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Heraldic Page 7 of 17
Short report of transport
The objects have been transported in a timber frame with Styrofoam and neutral cotton/molton tissue.
CONSERVATION MATERIAL
Conservation material (producer, product name, characterization, data, etc.)
Araldite® binder AY103 by 100 parts, hardener HY951 by 9 parts (Astorit AG 8840 Einsiedeln). Hardening at 22°C during 24 h.
Purpose of use
consolidation of paint layer / paint pigments
coating / lamination / doubling
edge bonding
………………
………………
………………
Application technique
application with brush
application with spray
single application
repeated application yes
concentration %
mixing ration of Araldite® AY103 / HY951 100:9
..........................
..........................
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Heraldic Page 8 of 17
Further information :
According to documents of Konrad Vetter, the fragments have probably been thoroughly cleaned, especially on the unpainted backside. Single fractures were scotch taped on the painted surface (A). Then the fracture was opened for inserting the Araldite® (B). The remaining Araldite® was removed with acetone.
For thin fragments (1-1.5mm) with multiple fractures, the simple edge bonding was not considered to be sufficient. The doubling method was used. A thin carrier glass was cut and sometimes reheated in a plaster mould taken from the original fragment. Araldite® was poured on the carrier glass, the fragment was then put on top and left under pressure with a weight, for 24 hours/22°C. The resin coming out all around the doubled glass has been removed with a sharp blade after 6-7 hours.
Date of application
About 1971
Documentation of this treatment
photographs (colour transparencies, b&w prints, colour prints, digital images)
written records
diagrams
data-files
...........................
...........................
Further information:
The written records of the methods used by the restorer K. Vetter are kept in the archives of the Vitrocentre and are analyzed for the project. Oral recordings will also be available
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Heraldic Page 9 of 17
The treatment of a major piece of this panel has been used as an example in the documentation of Konrad Vetter on his using of resins for stained glass conservation:
Short: A neutral glass was covered with a foil, to protect the painted surface of the original piece was prepared with a foil too. The Araldite® was applied to the glass and the original was slowly placed on the resin layer. The sandwich was compressed smoothly to have a thin Araldite® film and fixed with a cello tape.
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Heraldic Page 10 of 17
The resin around the doubling glass piece was removed with the foil after 6-7 hours. Araldite® on the edge was cleaned with a sharp blade.
Cello taped
Original glass piece
Neutral glass
Araldite®
Do you think this documentation is
Exact more or less reliable
Previous restorations (data, treatments, material)
Do you think the information is
exact more or less reliable hearsay
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Heraldic Page 11 of 17
CONDITION REPORT / DOCUMENTATION IN THE WORKSHOP
Pictures of panel / glass in transmitted light
Lighting: Fluorescent tube inside the workbench (Lumilux Daylight). All digital photos in this data sheet : Nikon D-90
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Heraldic Page 12 of 17
Pictures of panel / glass in reflecting and raking light, internal and external surface
Pictures of panel in reflecting and raking light, internal surface.
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Heraldic Page 13 of 17
Pictures of panel in reflecting light, external surface.
Examination of the object (if possible with microscope)
Detailed phenomenological optical analysis will be performed.
Short:
The glass is in stable condition. On the (laminated as well as open) external surfaces some pitting corrosion. No pitting corrosion on the external surface.
The paint and leading are in very good condition.
The Araldite® is yellowing and in some places looses adhesion, showing different degrees and types of deterioration. For a better understanding see the sketch below:
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Data sheet for pilot objects
ObjectData Burgdorf Heraldic Page 14 of 17
Is still bonded
. . . the bonding is losing
the bonding is losing from a transaction of movement.
friable Araldite®
Selected damages
doubled piece of glass
doubled piece of glass with cracked Araldite®
selected damage for sample
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Heraldic Page 15 of 17
Selection and documentation of samples to be analysed Questions to the scientists
Why are there different degrees of yellowing of Araldite® in an intact doubling?
Reasons for the different stages of adhesion, flaking and cracking of the resin layers?
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Heraldic Page 16 of 17
Selection and documentation of areas for reversibility tests or reactivation tests
Reasons why the resin has not been yellowing in a particular area?
What can affect the adhesion of the Araldite®? And how is it possible to separate the Araldite® from the original glass, without any damages (reversibility)?
CONSTGLASS
Data sheet for pilot objects
ObjectData Burgdorf Heraldic Page 17 of 17
RESPONSIBLE CONSERVATORS (name, phone, e-mail)
Person 1 Stefan Trümpler +41 26 652 18 34 truempler.vitrail@bluewin.ch
Person 2
Aline Dold +41 79 662 90 38 vitrail@bluewin.ch / info@atelierdold.ch
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Data sheet for pilot objects
Smolensk 9 st. Page 1 of 16
Object: Smolensk 9 st. – pilot object Date: 15.05.2008
OBJECT IDENTIFICATION
Site Cracow (Poland)
Building Smolensk 9 (former Industrial Museum)
Location and orientation of the window
Plan of the building
N
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Data sheet for pilot objects
Smolensk 9 st. Page 2 of 16
Description of the window opening (dimensions, number of lights; photo, test panel marked)
Three separate windows:
A- groud floor (pilot object) dim: x=90 cm; y=160 cm
B - first floor: dim: x=90 cm; y=240 cm
C - third floor: dim: x=90 cm; y=400 cm
Pilot window and pilot panel marked yellow
A
B
C
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Data sheet for pilot objects
Smolensk 9 st. Page 3 of 16
Date 1913
Short description of the window (identification of subject, artist, workshop)
The building designed by T.Stryjenski (structure), J. Czajkowski (facade, staircase); W. Jastrzębowski (furnishings), Jan Uziębło: stained glass windows in the staircase. Workshop: Krakow Stained Glass Company S.G. Żeleński (in existence since 1902).
Owner Academy of Fine Arts, Cracow, Poland
Person(s) in charge The Rector of the Academy of Fine Arts
Investigated panel (inventory number CVMA number, size)
A1, dim: 44 x 80 cm
CONSTGLASS
Data sheet for pilot objects
Smolensk 9 st. Page 4 of 16
Manufacturing technique
unpainted glazing rolled and colored glass +
painted glazing -
oxide paint / grisaille paint inside -
oxide paint / grisaille paint outside -
silver stain inside -
silver stain outside +
transparent enamel inside -
transparent enamel outside -
.gilding outside +
special leading +
CONSTGLASS
Data sheet for pilot objects
Smolensk 9 st. Page 5 of 16
Further information :In Smolensk windows the artistic values were
created by using: special rolled glass (fig.1), carved leading (fig.2), gilding form outside
fig.1 decorative cathedral glass
fig. 2 carved load came fig. 3 gilded glass (outside)
ENVIRONMENT IN SITU / IN STORAGE
Protective glazing
no protective glazing +
protective glazing -
installed in the original position of the ancient panels -
mounted to the outside (ancient panels stay in their original position)
-
no ventilation -
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Data sheet for pilot objects
Smolensk 9 st. Page 6 of 16
internal ventilation -
external ventilation -
size of interspace between ancient panel and protective glazing
n.a.
ventilation slot at the top (size) n.a.
ventilation slot at the bottom (size) n.a.
date of installation n.a.
Further information:
Material protective glazing
Surround materials and construction related materials
Window’s surround – sandstone, brick Ferramenta – iron, saddle bars – iron from outside). Protective grilles – NO Sealant: linseed putty Leading – 95 years old. Low strength, local breaks– crumbling Treatment from beginning of window’s existence - none
Museal exposition / Storage
Room n.a.
Cabinet n.a
Store n.a Further information:
CONSTGLASS
Data sheet for pilot objects
Smolensk 9 st. Page 7 of 16
Objects exposed to
partial sunlight -
daylight, but no direct sunlight +
artificial warmlight -
artificial coldlight -
mixed warm-/coldlight -
Note:
Climate of the building
No data on climate available. Personal feeling suggest that interior climate is quite favorable for human beings. Central heating installed, also on the staircase, but far from the windows.
Outside climate rather humid (mean RH value about 70%).
As the window is north oriented and screened by surrounding walls, no direct sunlight reaches it. thus humidity may be higher and more stable than on the open terrain.
The test window is situated on the ground floor , thus no direct water or snow reaches it. Some wetting from outside possible from splash water .
No condensation observed.
The man-made damages possible due to low ledges, possiblity of sitting on them and leaning on lowest panels
Further information / observations:
CONSTGLASS
Data sheet for pilot objects
Smolensk 9 st. Page 8 of 16
INSPECTION OF THE SITE BEFORE REMOVAL (WITH PICTURES)
Requirements for a safe removal in respect of minimal intervention
1. Dismantling from outside and inside 2. Three persons needed 3. Sealant crumbling and missing 4. Due to panels design do not bend! 5. Since leading is nearly one hundred years old, may be very weak. 6. No scaffolding necessary
Environmental causes for damage
Air pollution – gaseous and solid
Splash water from outside
Higher humidity - due to orientation and isolation
Short report of removal
CONSTGLASS
Data sheet for pilot objects
Smolensk 9 st. Page 9 of 16
The test panel was removed by three persons. After removing the sealing putty (hard, but crumbling easily) with chisel, the saddle bars were removed and the panel dismantled. No particular problems occurred. The opening was temporary protected with cathedral glass
Short report of transport As the test site is situated close to the conservation laboratory no special packing was required. It was transported with a car, in a boot. Panel was laid flat on the soft particleboard, protected from the top with another one and secured with a tape. The whole transportation took 5 minutes.
The surface of the test panel was neither treated nor touched.
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Data sheet for pilot objects
Smolensk 9 st. Page 10 of 16
CONSERVATION MATERIAL
Conservation material (producer, product name, characterization, data, etc.)
According to oral information repairs of broken glass were made without dismantling from inside with Polish epoxide resin: Epidian 53 (or 55).
Other materials has not been found
Below are given basic data on this still produced material.
Z.CH. “Organika-Sarzyna”, ul. Chemików 1 37- 310 Nowa Sarzyna, Poland
Epoxside resin: Epidian (probably Epidian 53) Epidian epoxy resins are the Bisfenol A ((CH3)2C(C6H4OH)2) and epichlorohydryn (C3H5ClO) based Resin: Epidian 53
Colour: colourless to light yellow
: solution of resin Epidian 5 (molecular mass <700) in non active solvent
Hardener Z-1
Composition: mixture of isomers of tri-ethylene-tetra-amine [CH2NHCH2CH2NH2]2. molecular formula: C6H18N4 IUPAC name: N,N'-bis(2-aminoethyl)ethane-1,2-diamine no. CAS: 112-24-3 Harmful
Selected resistance parameters of resins after curing Data for Epidian 5 were added for comparison as it is the main
component of Epidian 53 Epidian epoxy resins are the Bisfenol A ((CH3)2C(C6H4OH)2) and epichlorohydryn (C3H5ClO) based Resin: Epidian 53: solution of resin Epidian 5 (molecular mass <700) in non active solvent Colour: colourless to light yellow Hardener Z-1 Composition: mixture of isomers of tri-ethylene-tetra-amine [CH2NHCH2CH2NH2]2. molecular formula: C6H18N4 IUPAC name: N,N'-bis(2-aminoethyl)ethane-1,2-diamine no. CAS: 112-24-3 no.WE: 203-950-6 Symbol: C, Xn Harmful Epidian 53 was popular in Poland for stone conservation (structural reinforcement), now not in use. Also as adhesive for stone and other inorganic materials, glass including. To my best knowledge never used as a coating for glass.
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Data sheet for pilot objects
Smolensk 9 st. Page 11 of 16
Purpose of use consolidation of paint layer / paint pigments -
coating / lamination -
edge bonding +
………………
………………
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Application technique
application with brush +
application with spray -
single application +
repeated application times
concentration 95%
mixing ration 100:10
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Further information :
resin was applied from inside only, without dismantling either panels nor glass. The resin has not penetrated into to the break well , leaving it opened from outside.
Date of application
seventies - eighties of 20th c. (?). No written records.
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Data sheet for pilot objects
Smolensk 9 st. Page 12 of 16
Documentation of this treatment
photographs (colour transparences, b&w prints, colour prints, digital images) -
written records -
diagrams -
data-files -
........................... -
........................... -
Further information:
Do you think this documentation is
exact n.a more or less reliable n.a hearsay
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Data sheet for pilot objects
10_ObjectData_KRA_AFA.doc Page 13 of 16
Previous restorations (data, treatments, material)
e.g. releading, surface cleaning, edge-bonding, consolidation of painted decoration, puttying, etc. Give date and treatment method, available records; possibly interview retired staff.
No restorations performed. Perhaps washing from inside by cleaning ladies
Do you think the information is
exact - more or less reliable - hearsay +
CONDITION REPORT / DOCUMENTATION IN THE WORKSHOP
Pictures of panel / glass in transmitted light
Daylight. Due to weak leading part of the test panel had to be dismantled.
Pictures of panel / glass in reflecting and raking light, internal and external surface
Fluorescent- daylight external surface
Examination of the object (if possible with microscope)
Glass not visually corroded on neither side. Dark deposits (soot, industrial dust) outside. Dirt (domestic dust) from inside. Traces of its cleaning with wet rag.
Sealing putty partly missing, crumbling.
Leading too thin for such a panel. Locally broken. Very weak.
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Data sheet for pilot objects
10_ObjectData_KRA_AFA.doc Page 14 of 16
Selected damages
.
dirt accumulation from the outside panel bending
broken lead came and crumbling broken glass repaired with epoxide
putty
Selection and documentation of samples to be analysed
Questions to the scientists
Sample 1
sample 1 1
sample 2 2
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Data sheet for pilot objects
10_ObjectData_KRA_AFA.doc Page 15 of 16
Glass bonded with epoxide resin – Epidian 53. Strongly yellow, bonding completely lost .
Questions:
a. recent compostion (as compared to modern resin, still available)
b. reversibility tests
2.
test glass transmitted light adhesive transmitted adhesive reflected
a . delamination phenomena
b. dirt accumulation
Selection and documentation of areas for reversibility tests or reactivation tests
sample 2
Recommended