|Introduction to Colour|
Colour is an essential ingredient of consumer products especially those made from plastics. There are very few industries today in which colour does not play a major role. Originally colour was used for masking the natural coloration or discolouration of thermoset resins. This function has now decreased in importance with the availability of essentially colourless thermoplastics.
The colouration of plastics is not only an essential tool for sales promotion but is also an important factor in product design. The increased scale of production and assembly line operations of the industries using coloured plastic components has necessitated tighter control of colour from standard to batch, and from batch to batch. This in turn has brought about the need for some form of instrumentation in plastics colouring operations and colour measurement.