| 摘要 |
This invention is concerned with the modification of the hue of Alkali Blue pigments of known organic structures by intimate incorporation under aqueous alkaline conditions of a minor amount of a phenolic compound, illustratively beta naphthol. Upon recovery of the treated pigment under aqueous acid conditions, the hue of Alkali Blue is modified from a generally red shade blue to the greener end of the spectrum. The invention provides a novel means of color control and color modification with consequent correlative new compositions of matter.
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