The Effect of Different Mordants on Silk and Cotton Fabric Dyed with Mahogany (Swietenia macrophylla) Seed Pods by Using the Exhaust Method 


Vol. 26,  No. 12, pp. 5597-5610, Dec.  2025
10.1007/s12221-025-01207-5


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  Abstract

The majority of synthetic dyes utilized in the textile sector are carcinogenic, non-biodegradable, and seriously detrimental to the environment. Natural dyes have gained a lot of attention lately as a way to avoid the environmental problems that come with synthetic colorants. This study investigates the dyeing performance of mahogany seed pod extract on cotton and silk fabrics using the exhaust dyeing method, with a focus on the effects of different mordants. The dye solution, extracted at pH 5 using acid boiling, was applied in an acidic medium (pH 3.5–5). Reflectance spectrophotometry was used to assess color strength (K/S) and CIE Lab values, along with wash, perspiration, and light fastness tests. The silk samples demonstrated superior dye uptake and fastness properties compared to cotton. The highest K/S value of 8.83 was observed on silk when a combination of copper sulfate and tannic acid was used, while the best result for cotton (K/S 1.48) was achieved using combined tannic acid and ferrous sulfate. Notably, samples dyed with ferrous sulfate and copper sulfate displayed deeper hues, while those treated with stannous chloride and alum showed lighter shades. Fastness ratings were generally good, with light fastness reaching up to grade 6 for the best combinations. Wash fastness ratings were mostly 4–5, with minor staining on wool observed. The findings support the potential of mahogany seed pods as a viable, sustainable natural dye source, especially for silk, and emphasize the role of mordant combinations in enhancing dye performance and color variety.

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  Cite this article

[IEEE Style]

S. Islam, S. Rahman, B. C. Mazumder, A. A. Mohin, I. Islam, A. Hoque, "The Effect of Different Mordants on Silk and Cotton Fabric Dyed with Mahogany (Swietenia macrophylla) Seed Pods by Using the Exhaust Method," Fibers and Polymers, vol. 26, no. 12, pp. 5597-5610, 2025. DOI: 10.1007/s12221-025-01207-5.

[ACM Style]

Shaima Islam, Shahidur Rahman, Badhon C. Mazumder, Arif Al Mohin, Iftekhar Islam, and Ashraful Hoque. 2025. The Effect of Different Mordants on Silk and Cotton Fabric Dyed with Mahogany (Swietenia macrophylla) Seed Pods by Using the Exhaust Method. Fibers and Polymers, 26, 12, (2025), 5597-5610. DOI: 10.1007/s12221-025-01207-5.

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