Abstract
The effects of random variations in all aspects of the dyeing process are considered in terms of the visual differences from target of the dyed material and the statistical chances of being within certain tolerance limits at the first attempt.This work is supported by a study of the accuracy with which dye is presented to substrate in bulk dyeing and this shows that two major causes of irreproducibility are the faulty weighing of dye and the inaccurate measurement of volume. This conclusion is based on work done with the co‐operation of four large dyehouses and there is no reason to suppose that their performance in these respects is grossly misrepresentative of the trade as a whole.
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