A kind of method utilizing natural indigo to dye denim yarn
A natural indigo and yarn technology, applied in dyeing, textiles and papermaking, can solve the problems of low affinity of leuco indigo to cotton fiber, poor color brightness and slow reduction, so as to improve the utilization rate and The effect of reduction ability, deep color and high reduction rate
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Embodiment 1
[0026] The method of utilizing natural indigo dyed denim yarn of the present embodiment, the steps are as follows:
[0027] (1) Dye pre-reduction: Put the natural indigo into a beaker, add a small amount of alcohol and water and mix thoroughly, then add water and stir to reach 1 / 3 of the total liquid volume. At this time, the concentration of natural indigo is 1.5g / L (equivalent to The concentration in the leuco dye solution is 0.5g / L), adding sodium hydroxide 3g / L (equivalent to the concentration in the leuco dye solution is 1 g / L), hydrosulfite 1.5 g / L (equivalent to The concentration in the leuco dye solution is 0.5 g / L), the hydrosulfite stabilizer is 0.75 g / L (equivalent to the concentration in the leuco dye solution is 0.25 g / L), and it is used at 40°C The dye is fully reduced to obtain a leuco-body mother liquor; wherein the hydrosulfate stabilizer is made of the following components by weight: 40% glucose, 30% sodium hypophosphite, and the balance is anthraquinone;
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Embodiment 2
[0035] The method of utilizing natural indigo dyed denim yarn of the present embodiment, the steps are as follows:
[0036] (1) Dye pre-reduction: put natural indigo into a beaker, add a small amount of alcohol and water and mix thoroughly, then add water and stir to reach 1 / 3 of the total liquid volume. At this time, the concentration of natural indigo is 6g / L (equivalent to The concentration in the leuco dye solution is 2 g / L), adding sodium hydroxide 9g / L (equivalent to 3 g / L in the leuco dye solution), and 3.6 g / L hydrosulfite (equivalent to The concentration in the leuco dye solution is 1.2 g / L), the hydrosulfite stabilizer is 1.8 g / L (equivalent to the concentration in the leuco dye solution is 0.6 g / L), and the dye is made at 50°C Sufficient reduction to obtain leucosome mother liquor; wherein the hydrosulfate stabilizer is made of the following components by weight: 50% glucose, 40% sodium hypophosphite, and the balance is anthraquinone;
[0037] (2) Preparation of dy...
Embodiment 3
[0044] The method of utilizing natural indigo dyed denim yarn of the present embodiment, the steps are as follows:
[0045] (1) Dye pre-reduction: put natural indigo into a beaker, add a small amount of alcohol and water and mix thoroughly, then add water and stir to reach 1 / 3 of the total liquid volume. At this time, the concentration of natural indigo is 3.9g / L (equivalent to The concentration in the leuco dye solution is 1.3g / L), adding sodium hydroxide 6g / L (equivalent to the concentration in the leuco dye solution is 2g / L), sodium hydrochloride 2.4 g / L (equivalent to The concentration in the leuco dye solution is 0.8 g / L), the hydrosulfite stabilizer is 1.2 g / L (equivalent to the concentration in the leuco dye solution is 0.4 g / L), and the dye is made at 45°C Sufficient reduction to obtain leucosome mother liquor; wherein the hydrosulfate stabilizer is made of the following components by weight ratio: 40% glucose, 40% sodium hypophosphite, and the balance is anthraquinone...
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