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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 6241.2

March 22, 2001

4.4 Performance of test.

4.4.1 Preparation of test specimen. The test specimen shall be prepared as indicated in the

product specification.

4.4.2 Determination of reflectance. Determine the spectral reflectance relative to the reference

standard at the wavelength given in tables I and II or at sufficiently close intervals so that

interpolation will permit accurate determination of the spectral reflectance at these wavelengths.

TABLE I. Thirty wavelengths at which spectral reflectance values

are to be obtained in red and near infrared.

Wavelengths

No.

micrometer

No.

micrometer

0.6975

0.7742

.7077

.7787

.7144

.7831

.7200

.7878

.7253

.7925

.7301

.7973

.7347

.8022

.7392

.8071

.7436

.8122

.7479

.8171

.7522

.8232

.7566

.8292

.7609

.8357

.7653

.8434

.7697

.8542

TABLE II. Ten wavelengths at which spectral reflectance values

are to be obtained in the infrared.

Wavelengths

No.

micrometer

No.

micrometer

0.929

0.998

.945

1.012

.959

1.030

.972

1.053

.985

1.099

FED. TEST METHOD STD. 141D