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GCSE Design and Technology · key term
A colouring substance added to a material to give it a particular colour or visual effect.
Used by Edexcel
Specification 4.3.1, 4.8.1 · Paper 1
Revise: Aesthetic FactorsSpecial pigments provide further options. Phosphorescent pigments allow a product to glow in the dark after absorbing light. Thermochromic pigments change colour with temperature.
A colouring substance mixed into a material, such as the resin used in GRP.
Distinguish phosphorescent pigments, which glow in the dark, from thermochromic pigments, which change colour with temperature.
Do not assume that adding pigment automatically provides UV protection: colour and protective performance are different properties.
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