Reference number
ISO 4621:1986
ISO 4621:1986
© ISO 2025
International Standard
ISO 4621:1986
Chrome oxide green pigments — Specifications and methods of test
Edition 1
1986-07
1986-07
ISO 4621:1986
10568
Published
(Edition 1, 1986)
This publication was last reviewed and confirmed in 2023.
Therefore this version remains current.
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).
General information
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Status: PublishedPublication date: 1986-07Stage: International Standard confirmed [90.93]
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Edition: 1Number of pages: 5
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Technical Committee :ISO/TC 256ICS :87.060.10
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