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United States Department of Agriculture

Agricultural Research Service

Title: Fiber Chemistry Effects on Dye Uptake

Author
item Gamble, Gary

Submitted to: National Cotton Council Beltwide Cotton Conference
Publication Type: Abstract Only
Publication Acceptance Date: October 15, 2008
Publication Date: N/A

Interpretive Summary: Storage of cotton for extended periods of time in warehouse conditions leads to an increase in fiber yellowness, or +b. Little information exists regarding whether this color change results in any detrimental effect upon cotton processing, including dyeing of finished fabric. the results of this work indicate that, even though the scouring and bleaching process removes color differences, there still remains an effect of bale ageing upon the dye uptake ability of the resulting fabric.

Technical Abstract: The dyeing efficiency of cotton knits was investigated as a function both of metal contents native to the cotton fiber as well as the presence of sugar-protein reaction products which contribute to +b. Results indicate that aged cotton fiber exhibits both a higher +b value and a tendency to incorporate higher amounts of reactive dye than un-aged fiber. In addition, removal of metals by EDTA results in a decreased tendency to incorporate reactive dye. The results will be discussed in terms of the reaction sites available for cross-linking with the reactive dye molecule.

Last Modified: 10/24/2014
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