Colouring material is a term used to refer to substances that are used to add colour to a variety of surfaces. PIGMENT is one type of colouring material, which is a dry powder that is mixed with a liquid to create a paint or dye. PIGMENT is composed of particles of colouring material that are suspended in a medium such as oil, water, or resin. PIGMENT is used in a variety of applications, including painting, printing, and dyeing fabrics.