ABSTRACT
In the latter definition, the difference between pigment and dye is emphasized. However, other authors prefer to use the more generic term
colorant
. Colorants are defined as substances that modify the perceived color of objects, or impart color to otherwise colorless objects. With this definition, pigments and dyes are grouped within the term colorants. It is reasoned that if only solubility is considered, the same substance could be a dye or a pigment depending on how it is used.
