VISCOSITY
Paul N. Gardner Co., Inc. www.gardco.com (954) 946-9454
1-800-762-2478
STEIN HALL VISCOSITY CUPThe Stein Hall Viscosity Cup is used in
viscosity testing where the number of seconds required for a set
volume of adhesive to flow through the viscom-eters orifice.
Viscosity is an important property of starch based adhesives and
strongly affects bonding at the corrugator. Some pastes are too
thick for certain paper and some are too thin, this is where
viscosity testing is important. The apparent viscosity of adhesives
used in the manufacture of corrugated containerboard is measured by
the number of seconds required for 100 cc of adhesive to pass
through an orifice in a disc. The instrument used throughout the
industry since 1934 is called a Viscosity Cup or Stein-Hall Cup.
The readings obtained do not directly correspond with any other
viscosity scale.
The cup must be calibrated before performing the test. Check the
orifice to make sure it is not plugged, corroded or worn.
Manufacturing variations in orifice size and tube diameter make it
necessary to calibrate each cup to a known standard. In addition,
calibration may be required due to a worn disc or when replacing
the disc.
Calibration Procedure: Place your finger over the orifice and
fill the cup with 75F (24C) water. Remove your finger and, with a
stopwatch, measure the time it takes for the level in the cup to
drop from the upper pin to the lower pin. The time should be 15
seconds. If it is longer than that, bend the pins together and
check the calibration again. If it is shorter than that, bend the
pins apart and check the calibration again. Continue until the time
is 15 seconds.
Fill the cup with strained adhesive and, with a stopwatch,
measure the time it takes for the level in the cup to drop from the
upper pin to the lower pin. The time in seconds is the Stein-Hall
viscosity. Record the time and temperature of adhesive.
General Instructions
VI-840010 Stein Hall Viscosity Cup, complete with metal disc and
gasket ...........................................$295.00VI-840021
Metal Disc (ONLY)
...........................................37.00VI-840031 Rubber
Gasket ................................................20.00
Metal Disc
Side Marked Face Out
Rubber Gasket
Disc Retainer
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Quality Testing Instruments Since 1936
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