METHOD 4203.2
March 22, 2001
REDUCIBILITY AND DILUTION STABILITY
1. SCOPE
1.1 Scope. This method provides a procedure for determining the reducibility of a coating
material with the recommended solvent for that material.
2. APPARATUS
2.1 Cylinder. A 100-ml graduated cylinder with stopper.
3. REAGENTS
3.1 Reagents. None required.
4. PROCEDURE
4.1 Material preparation. The material shall be diluted with the amount of the solvent required in
the product specification or according to the manufacturer's instructions, whichever applies. Unless
otherwise specified, all materials used in and during the test shall be at a temperature of
23°C ± 1.1°C (73.4°F ± 2°F).
4.2 Observations upon mixing. The material shall mix readily and easily without excess stirring
or shaking.
4.3 Observations upon standing. Let the diluted material stand undisturbed for 4 hours unless
otherwise specified in the product specification. At the end of the standing period, freedom from
these defects, curdling, precipitation, and separation shall be observed.
4.4 Condition of material. If doubt exists as to the condition of the material after the standing
period, flow an amount of the material onto a glass panel without agitating it. Any of the defects
mentioned in 4.3 will then be observable.
5. PRECISION
5.1 Data. No data.
6. NOTES
6.1 Notes. None.
FED. TEST METHOD STD. 141D
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