| abstract |
Method of preparing pigment compositions, characterized in that they contain an intimately incorporated organic pigment with a small amount of an organic pigment derivative containing a secondary or tertiary amino group, whose nitrogen atom is attached to the chromophore part of the molecule, through a methylene group, and by comprising grinding together a pigment and a pigment derivative as defined, in the presence of an aid for grinding, such as an inorganic salt. (Machine-translation by Google Translate, not legally binding) |