Chapter 10 Colorants: Organic and inorganic pigments
volume 1 of \AZimuth\, North-Holland, (1998)DOI: http://dx.doi.org/10.1016/S1387-6783(98)80013-5
Abstract
Publisher Summary This chapter discusses colorants that include both organic and inorganic pigments. It also discusses its international nomenclature and classification of the organic and inorganic pigments based on their chemistry and color. A definition of a pigment is given that has been proposed by the Color Pigments Manufacturers Association (CPMA), formerly known as the Dry Color Manufacturers Association (DCMA) in response to a request from the Toxic Substances Interagency Testing Committee. The most obvious property of a pigment is its hue, which is its color as being distinctly blue, yellow, green, or red and the finer detail that distinguishes a green shade (i.e., greenish) yellow from a red shade yellow. Evaluation of any pigment must include a test of full color or masstone that requires inspection of the pigment, undiluted with white, but fully dispersed in a medium that has relevance to the colored formulation. Inspection of this full color shows the hue, intensity, transparency, cleanliness and jetness of the pigment. Comparison of this using side by side evaluation with a standard or specification full color show how close the test pigment comes to the standard or specification.