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GCSE Design and Technology · key term
A colouring substance that changes colour in response to exposure to ultraviolet (UV) light.
Used by AQA
Paper 1
Revise: Smart materialsA photochromic pigment changes colour in response to ultraviolet light. UV is present in sunlight, so this material can make a product respond to outdoor light conditions.
Distinguish thermochromic pigments, triggered by temperature, from photochromic pigments, triggered by UV light.
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