Colourant - What is a colourant?
Definition of COLOURANT:
The component of an ink or toner that gives it a particular colour. The colourant is usually a pigment or a dye, although a combination of both may be used.
Here is the Harvard-style citation to use if you would like to reference this definition of the word colourant:
Label Planet (2020) What is a colourant? | Colourant Definition. Available at: https://www.labelplanet.co.uk/glossary/colourant/ (Accessed: January 1, 2023).