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<p>The fireweed yarn is derived from the leaves of a plant endemic to southwest China. This material has been traditionally utilized by ethnic minorities for clothing production. It possesses a rich historical significance and environmentally sustainable characteristics, warranting further protection and development. In order to solve the problem of single color of fireweed yarn, this paper employs various mordant technology and four kinds of metal mordant to dye the yarns with natural gardenia yellow dye. The dyeing properties are evaluated based on dyeing strength and fastness, while dyeing parameters are optimized through orthogonal testing. The results indicated that the optimal dyeing conditions for fireweed yarn dyed with gardenia yellow dye were as follows: employing the co-mordanting method with ferrous sulfate as a mordant, a dyeing temperature of 80&#xa0;°C, a dyeing duration of 70&#xa0;min, a dye concentration of 30% (on weight of fiber), and a salt concentration of 20&#xa0;g/L. The color fastness of dyed yarns to light was rated at Grade 4, and the color fastness to washing was classified as Grade 4 (color change) and Grade 3 (color staining), with favorable application prospects.</p>

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Dyeing of Fireweed Yarn with Natural Gardenia Yellow Dye

  • 期刊论文

  • 发表日期：

    2026年6月22日

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  • Zhuyu Li,
  • Ying Ke

摘要

The fireweed yarn is derived from the leaves of a plant endemic to southwest China. This material has been traditionally utilized by ethnic minorities for clothing production. It possesses a rich historical significance and environmentally sustainable characteristics, warranting further protection and development. In order to solve the problem of single color of fireweed yarn, this paper employs various mordant technology and four kinds of metal mordant to dye the yarns with natural gardenia yellow dye. The dyeing properties are evaluated based on dyeing strength and fastness, while dyeing parameters are optimized through orthogonal testing. The results indicated that the optimal dyeing conditions for fireweed yarn dyed with gardenia yellow dye were as follows: employing the co-mordanting method with ferrous sulfate as a mordant, a dyeing temperature of 80 °C, a dyeing duration of 70 min, a dye concentration of 30% (on weight of fiber), and a salt concentration of 20 g/L. The color fastness of dyed yarns to light was rated at Grade 4, and the color fastness to washing was classified as Grade 4 (color change) and Grade 3 (color staining), with favorable application prospects.