FED-STD-141 Paint, Varnish, Lacquer And Related Materials: Methods Of Inspection, Sampling And TestingThis standard elaborates the methods used to determine the physical and chemical properties of paint, varnish, lacquer, and related materials. The purpose of this standard is to establish standardized testing methodologies and to eliminate unnecessary or undesirable variations in test results when evaluating a product??s adherence to specification requirements. If any variation or modification of the methods established in this standard is required by any specification, the procedures listed in the specification will take precedence. Any conflict between this standard and any particular specification will be resolved in favor of the specification.

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METHOD 4061.3

March 22, 2001

adhesion of the first coat, the drying time of the second coat does not exceed the maximum

specified (if any) for the first coat.

5. PRECISION

5.1 Agreement. Because of the subjective nature of the drying time test, the agreement to be

expected between laboratories depends upon their understanding of the terms used, and cannot be

established with certainty. Within any laboratory, the agreement depends upon the material being

tested, some coatings being much sharper in their end point than others, but duplicate

determinations shall agree within 10 percent of the time of drying.

5.2 Measurement of drying time. Critical factors in the measurement of drying time of coatings

are room temperature, relative humidity, and rate of airflow over the sample.

6. NOTES

6.1 Patent. The standard tack tester is fully described in U.S. Patent 2,406,989, dated

September 3, 1946.

FED. TEST METHOD STD. 141D