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.

Pages 1 - - 47 - 48 - 49 - 50 - 51 - 52 - 53 - 54 - 55 - 56 - 57 - 58 - 59 - 60|||

METHOD 6241.2

March 22, 2001

4.5 Calculation of reflectance from spectrophotometric data. Tabulate spectral reflectance data

for the specimen for the 30 wavelengths listed in table I and the 10 wavelengths in table II.

Calculate the average of the 30 spectral reflectance values in table I and the 10 values in table II.

4.6 Report. Report the average infrared reflectance of the specimen for the wavelength intervals

specified in tables I and II. If required, report the spectral reflectance of the test specimen either as a

plotted curve or as tabulated data. Report the method of specimen preparation, if any. Report the

reference standard and spectrophotometer used for the measurements.

5. PRECISION

5.1 Data. No data.

6. NOTES

6.1 Notes. The General Electric (Hardy) recording spectrophotometer, the Beckman Model DK-2A

spectrophotometer, and Cary Model 14 spectrophotometer should be used. The specular component

should be excluded. The Beckman DU spectrophotometer does not use hemispherical viewing and,

therefore, does not meet the geometric requirements of the method, but it should be used if no other

instrument is available.

FED. TEST METHOD STD. 141D