The Effect of Light on Textiles

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Abstract
The fading of dyes and tendering of fibres caused by exposure of dyed textiles to light is illustrated by work carried out at the Shirley Institute, and the importance of considering the fibre–dye–atmosphere system as a whole is emphasised. The same dyes differ in their effect on the photochemical degradation of cellulose acetate and nylon. Tendering of cotton is shown to be caused almost entirely by ultraviolet radiation, and the effect of light quality on fading and tendering is demonstrated. Tendering of vat‐dyed cotton on north‐ and south‐facing exposure is examined, and the behaviour of undyed and dyed cotton on indoor and outdoor exposure leads to the examination of the effects of atmospheric contaminants, particularly sulphur dioxide, in causing serious photochemical damage. Possible methods of protection from the damaging effects of light are discussed.

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