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ISO 4621:1986

Chrome oxide green pigments — Specifications and methods of test

Publication date:   Jul 17, 1986

General information

90.93   Standard confirmed   Oct 27, 2023

ISO

ISO/TC 256 Pigments, dyestuffs and extenders

International Standard

87.060.10   Pigments and extenders

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Scope

Specifies three grades, which shall not be in admixture with other colouring matter of organic or inorganic nature and shall be free from extenders. The pigment consists essentially of chromium(III) oxide (Cr2O3) in the form of a dry powder. Grade 1, these pigments shall contain a residue on a sieve of 45 nm mesh aperture of not more than 0,01 % (m/m); grade 2, under the same conditions, shall contain a residue of more than 0,01 % (m/m) and not more than 0,1 % (m/m) and grade 3 shall contain a residue of more than 0,1 % (m/m) and not more than 0,5 % (m/m).

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PUBLISHED
ISO 4621:1986
90.93 Standard confirmed
Oct 27, 2023