ISO 4621:1986
Chrome oxide green pigments; Specifications and methods of test
- Standard No.
- ISO 4621:1986
- Release Date
- 1986
- Published By
- International Organization for Standardization (ISO)
- Latest
- ISO 4621:1986
- 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).
ISO 4621:1986 history
- 1986 ISO 4621:1986 Chrome oxide green pigments; Specifications and methods of test
