ASTM D7133-05
Historical Standard: ASTM D7133-05 Standard Test Method for Polyurethane Raw Materials: Instrumental Measurement of Tristimulus CIELAB Color and Yellowness Index of Liquids
SUPERSEDED (see Active link, below)
ASTM D7133
1. Scope
1.1 This test method provides an instrumental method for measuring the CIELAB color and Yellowness Index (YI) of liquid polyurethane raw materials. The CIELAB and YI results are derived from mathematical manipulation of CIE tristimulus values in accordance with Practices E 308 and E 313, respectively.
1.2 See Section 5 for cautions in using this test method.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Note 1There is no equivalent ISO standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D883 Terminology Relating to Plastics
D1193 Specification for Reagent Water
E180 Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals
E284 Terminology of Appearance
E308 Practice for Computing the Colors of Objects by Using the CIE System
E313 Practice for Calculating Yellowness and Whiteness Indices from Instrumentally Measured Color Coordinates
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
Keywords
CIELAB; color; colormetric analysis; instrumental measurement; isocyanates; L*a*b*; light; methylene di(phenylisocyanate); polyols; polyurethane raw materials; polyurethanes; spectrophotometry; transmission; tristimulus; yellowness index; YI; Yellowness index; Color; Instrumental measurement--color/light; Polyurethane raw materials;
ICS Code
ICS Number Code 83.080.20 (Thermoplastic materials)
DOI: 10.1520/D7133-05
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