Active standard | Published: 17/07/1986

ISO 4621:1986

Chrome oxide green pigments — Specifications and methods of test
(Pigments verts d´oxyde de chrome — Spécifications et méthodes d´essai)

Available languages: English, French

Available design: electronic design (pdf), Print design

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Detail information

Designation: ISO 4621:1986

Publication date: 17/07/1986

Pages: 5

Country: International technical standard

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Anotation

Description / Abstract: 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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