By: Christian Joshua Boling

Arnel Domingo

The Water Supply

Should have hot and cold running

water

Must be reliable

Not be mixed chemistry with

water that has a very high chlorine

content.

Must be clean

Water Flow Test

Takes only 15 minute to make four changes

in one hour.

adjust water flow accordingly.

If too slow, and the tap is open, there

may be partial bloackage, or

maybe low pressure of water.

Cle

anin

g th

e Ta

nks

Drain the developer and fixer tanks.

Ensure that chemistry and contaminated water disposed in safe manner.

Wash the tank. Use different brush pad for developer and fixer.

At Start Up ( Daily )

Feed a 35 x 43 cm waste unprocessed film into the processor to clean any deposit in rollers.

Ti may be necessary to feed in a second film if you feel it is necessary.

Do not use processed film as this will be too hard and may contain redisual fixer.

Do not proceed with the daily workload until you are satisfied to rollers you clean.

At Shut Down

Remove or clean all crossover rollers or plates.

Wipe off chemicals deposits on or around the processor. take special care with film feedtray

Developer

It affects the density, contrast and amount of base fog of a radiograph.

Fixer

Dissolves all unwanted film emulsion.

Makes image permanent

Temperature and fixing time is not critical as developer.

Dev

elo

per

/Fix

er T

ank Stir the tank before use

Check the tank temperature

Adjust the temperature to pre determined standard if necessary

Check if their is a leakage in the tank

The film storage must be away from the tank.

Developer Activity Test Using pH Paper ( Litmus Paper )

Can be used for freshly mixed developer. But is more useful to show contamination or

oxidation

Evaluation:

a. Note manufacturer’s recommended pH range ( usually around 10.0 – 10.5 )

b. Compare test strip to recommended range.

c. A reading of more than .4 below manufacturer’s recommendation suggest’s contamination.

d. Reading below .8 suggest oxidation.

e. Replace developer if reading is too high or low.

Fixer activity using Hydrometer test

Specific gravity of the fixer is in the region of .004 ( see manufacturer’s

recommendation )

Reference: https://books.google.com.ph/books?id=L-

1w849hNS4C&pg=PA107&lpg=PA107&dq=quality+control+automatic+processor&source=bl&ots=S77tAj1ti2&sig=boM4

yFC_3tJcbQWGBtqY9gtVAdo&hl=en&sa=X&ei=_medVJ-

dB4W9uASLyILgCQ&ved=0CEcQ6AEwAw#v=onepage&q=quality%20control%20automatic%20processor&f=false

Hold a strip of test paper in develepoer

approximately 10 seconds

observe colour change Compare with control strip.

A low specific gravity reading

means too dilute

A high specific garavity reading

means not dilute enough.

Note the reading at the surface of the

fixer

Place hydrometer in

fixer tank

1. Film Hangers.

Reference: http://www.tedndt.com/cat/cat45.php

Reference: http://www.avishkarexport.com/x-ray-equipments.html

Must be quality strong stainless steel construction that will last for year

Report if damage is spotted.

Larger hanger sizes have loop guides to hold the bow spring and top clips in line and maintain proper tension

Be sure that the hangers dont have any damage

It must be check everyday

Must be different size and shape for different film size.

2. Darkroom Luminous Interval Timer

Interval timer is important to control the time of development and fixation

Reference: http://www.state.nj.us/dep/rpp/qa/qa_down/radcg.pdf

Developer is 68° - 70°= 5 minutes. Optimal for most films.

Developer is 64° - 66° = 7 minutes

Developer is 72°- 76° = 4 minutes If the result is inconsistent, you can check

your timer.

Depending on temperature of

developer

3. Darkroom Thermometer

Reference:

http://www.state.nj.us/dep/rpp/qa/qa_down/radcg.pdf

• it is recommended that only a digital thermometer be used. Radiographic

• Avoid the use of a glass thermometer as they are easily broken in the processor.

Darkroom

• NEVERuse a thermometer that contains mercury since the mercury is photographic contaminant.

Thermometer

4. Darkroom Mixing Paddle

Reference:

http://webstag.kodak.cz/US/en/business/aim/industrial/ndt/literature/radiog

raphy/10.shtml

Separate paddles or agitators should be provided for the developer and fixer. If the paddles are washed thoroughly and hung

up to dry immediately after use, the danger of contamination when they are employed

again will be virtually nil

. A motor-driven stirrer with a stainless steel propeller is a convenient aid in mixing solutions. In any event, the agitation used in

mixing processing solutions should be vigorous and complete, but not violent.

Paddles or plunger-type agitators are practical for stirring solutions. They should be made of hard rubber, stainless steel, or some other material that does not absorb

or react with processing solutions.