Effect of Creaseproofing Agents on Lightfastness of Sensitive Dyes

Abstract

The lightfastness of several classes of dye is known to be greatly affected by certain types of finishing agents such as cationic softeners and conventional types of crease proofing agents. However, little or nothing has heretofore been published by either the dye companies or chemical manufacturers regarding the effects on lightfastness of some of the newer or lesser known creaseproofing cotnpounds. Three classes of dye which show the greatest sensitivity of lightfastness are the directs, the diazotized and developed, and the new "linkage" or "reactive" type dyes. This paper will describe the effects on lightfastness of most of the presently available creaseproofing agents on these three classes of dyes. A few selected vat dyes will also be included in the study. The data presented will be helpful to mills in selecting creaseproofing compounds for the finishing of dyed and printed fabrics.