ASTM D 7133 Standard Test Method for Polyurethane Raw Materials: Instrumental Measurement of Tristimulus CIELAB Color and Yellowness Index of Liquids

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ASTM D 7133 Document Information:

Title
Standard Test Method for Polyurethane Raw Materials: Instrumental Measurement of Tristimulus CIELAB Color and Yellowness Index of Liquids

ASTM International

Publication Date:
Dec 15, 2005

Scope:

This test method provides an instrumental method for measuring the CIELAB color and Yellowness Index (YI) 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.

See Section 5 for cautions in using this test method.

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 1—There is no equivalent ISO standard.

Keywords:

instrumental measurement

isocyanates

CIELAB

light

polyurethanes

polyurethane raw materials

color

tristimulus

L*a*b*

yellowness index

colormetric analysis

spectrophotometry

transmission

polyols

YI

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