氧化铬绿颜料 规范和试验方法

[中文适用范围]： 规定了三个等级，不得与其他有机或无机性质的着色剂混合，并且不得含有增量剂。 该颜料主要由干粉形式的氧化铬(III) (Cr2O3) 组成。 1 级，这些颜料在 45 nm 网孔筛上的残留物应不超过 0.01 % (m/m)；在相同条件下，2 级应含有大于 0.01 % (m/m) 且不大于 0.1 % (m/m) 的残留物，3 级应含有大于 0.1 的残留物。 % (m/m) 且不超过 0.5 % (m/m)。 [外文原描述]： 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).