ISO 4621:1986 Preview

Chrome oxide green pigments -- Specifications and methods of test

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

  • Current status : Published
    Publication date : 1986-07
  • Edition : 1
    Number of pages : 5
  • :
    ISO/TC 256
    Pigments, dyestuffs and extenders
  • 87.060.10
    Pigments and extenders

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