ASTM-D5724 › Standard Specification for Gouache Paints
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This specification establishes the requirements for composition, physical properties, performance, and labeling of gouache paints. Covered here are pigments, vehicles, and additives, wherein the requirements for which are included for pigment identification, lightfastness, and consistency. Some pigments meeting the lightfastness requirements in this specification are listed herein. Also, in order to identify other pigments that meet these requirements, instructions are given for test specimen preparation and the respective test methods for determining relative lightfastness. The conditions not covered in this specification that affect gouache paints are substrate, environmental conditions, storage, vehicles, pigments, additives, inerts, preparation of samples, coarse particles, fineness of dispersions, consistency, freeze-thaw stability, opacity (hiding power), bleeding, and color specification.
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1.1 This specification establishes requirements for composition, physical properties, performance, and labeling of gouache paints.
1.2 This specification covers pigments, vehicles, and additives. Requirements are included for pigment identification, lightfastness, and consistency.
1.3 lists some pigments meeting the lightfastness requirements in this specification. In order to identify other pigments that meet these requirements, instructions are given for test specimen preparation. Test methods for determining relative lightfastness are referenced.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
gouache paints; lightfastness; quality requirements; test specimens;; ICS Number Code 87.040 (Paints and varnishes); 97.195 (Items of art and handicraft)
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March 1, 2016