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Variation of Fading of Dyeings with Exposure
Author(s) -
Jaeckel S. M.,
Ward C. D.
Publication year - 1962
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1962.tb02484.x
Subject(s) - fading , grey scale , contrast (vision) , scale (ratio) , biological system , constant (computer programming) , statistics , mathematics , computer science , physics , artificial intelligence , biology , decoding methods , quantum mechanics , programming language
The relationship between the spacing of blue standards and changes in grey‐scale contrast on doubling the duration of exposure to constant illumination is examined: experimental results 1 suggest that the lower standards are spaced by a factor greater than 2. Fading‐rate relationships are derived from simple premises: they do not accord well with experimental results, and must be at least partially invalid, since the fading process is complex. Previously suggested relationships are only partly compatible one with another, but one fits recent results 1 well. Changes in grey‐scale contrast on doubling exposures are derived from published data and from new work, for very different illumination conditions: four out of six cases show common features with results from exposures to fluorescent tubes 1 . Light‐fastness assessments based on Fugitometer exposures of Standards 2 and 3 are always likely to be misleading.