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Fig. 1 | Heritage Science

Fig. 1

From: The lightfastness of early synthetic organic dyes

Fig. 1

a Summary of lightfastness results from Thorpe et al. for textiles dyed with synthetic and natural dyes in the late nineteenth century; b approximate fading of the ISO Blue Wool standards as a function of illuminance (daylight through glass) and irradiance hours. Vertical lines indicate possible scenarios for the standard fading period used by Thorpe et al.

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