What is pigment?
Refers to a material that alters the color of light that's transmitted or reflected due to selective absorption of wavelength. This process however, differs from phosphorescence, fluorescence and other luminescence forms where materials emit light. Materials chosen and developed by humans for use in art as pigments have special properties in most cases that make them the best for use in coloring materials. A pigment's tinting strength should be relatively high in relation to the material to be colored.