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Home>ASTM D4890-18

ASTM D4890-18

ASTM D4890-18

Standard Test Methods for Polyurethane Raw Materials: Determination of Gardner and APHA Color of Polyols

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1.1 ,These test methods measure visually the color of clear polyester and polyether liquids. They apply only to materials whose colors have light-absorption characteristics similar to those of the standards. An alternative method is Test Method D1209 (see Note 1).

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