Process for the PCC dyeing of long wet fabric webs on large-vat jigs

摘要

The process according to the invention relates to dyeing methods in which, coordinated with one another, the fabric-web transit time over a forward and return pass is the same length as or longer than the dye-absorption time relative to the economically reducible range of the fabric-web/dyestuff concentration. The process is characterised by the addition to the vat liquor, having the initial concentration Co, of "To Co" supplementary dyestuff quantities for each fabric-web meter winding round.