Thesis Details

Thesis Title: The effect of cotton aging on the color variation of dyed fabric
Thesis Author: David McAlister
Abstract: This thesis deals with the effects that atmospheric conditions during warehousing and . the type of bale covering have on the changes of cotton fiber properties and their subsequent . effect on shade variation of dyed fabric. Conditioning chambers were utilized to expose the cotton bales to simulated warehousing conditions over the four seasons of the year. Polypropylene, polyethylene, and burlap bagging were used as bale covering to vary the surface exposure of the cotton to the atmospheric conditions. The bales were allowed to age in the chambers over a twelve week period, which is double the average turnover time of six weeks in industry. The results of the thesis indicate that summer conditions induce the most change to fiber properties such as: u.v. fluorescence, color +b, and in some cases color Rd. The bales covered in polypropylene and burlap under summer conditions indicate a significant change in the three properties mentioned above from the inception orthe aging period to week twelve of aging. Results from the preparation and dyeing of the fabric from each of the twelve weeks of aging follow the same course of change as the fiber properties in that the fabric whiteness after preparation diminishes over the twelve weeks. Also of interest, is that the fabric dye uptake changes from week to week for each of the fabric samples which appears to indicate that the preparation of the fabric did not minimize the effect of the fiber property change due to aging.