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Abstract:
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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.
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