ASTM D4960 Standard Test Method for Evaluating the Color of Thermoplastic Traffic Marking Materials describes the instrumental determination of the color of thermoplastic traffic marking materials using the CIE trichromatic Color Measurement system.
Meaning and use

5.1 The test method provides a standard procedure for determining the color of thermoplastic traffic sign materials. This test method can be used in conjunction with various thermoplastic pavement marking specifications to determine that the material conforms to the specifications. Manufacturers of these materials can also use the method to determine the uniformity of thermoplastic traffic marking materials between batches.

5.2 Color standards and colorimeters are slightly different. This test method is only suitable for reporting results and listing information on instrument model names and calibration standards.

ASTM D4960-08-2013 Standard Test Method for Evaluating the Color of Thermoplastic Traffic Sign Materials

Step 1: Scope

1.1 This test method describes the instrumental determination of the color of a thermoplastic traffic marking material using the CIE trichromatic color measurement system.

1.2 Values expressed in SI units shall be considered standard. The values given in parentheses are for reference only.

1.3 This standard is not intended to address all safety concerns, if any, associated with its use. It is the responsibility of users of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory restrictions prior to use.