Using Citric Acid to Reduce Potassium Permanganate in a Sustainable Spray Method for Denim Fading
An experimental textile-engineering study of citric-acid-assisted denim fading, examining the balance between colour reduction, potassium permanganate use and fabric tensile strength.
Using Citric Acid to Reduce Potassium Permanganate in a Sustainable Spray Method for Denim Fading.pdf
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Overview
Completed in April 2025 in the Department of Textile Engineering at Ahsanullah University of Science and Technology (AUST), under the supervision of Professor Dr. Lal Mohan Baral.
This collaborative final-year project investigates whether combining citric acid with potassium permanganate can achieve a useful denim-fading effect while limiting damage to fabric strength. The full project report, including its experimental results and references, is shared by request.
Year
2025
Publication type
Final-year project report (TEX 400)
Abstract
The study compares 42 denim samples treated with different combinations of potassium permanganate and citric acid using high-volume, low-pressure spray application. Colour strength was assessed by spectrophotometry using K/S values, and tensile performance was evaluated using the ASTM D5035 method. The authors report a trade-off between stronger fading and fabric-strength retention, with selected combined treatments offering a more balanced result than higher potassium permanganate concentrations alone. These are findings from an undergraduate experimental project; broader environmental and industrial-scale performance would require further validation.