Method for improving color depth and light fastness of natural dye-dyed fabric
A technology of natural dyes and color depth, which is applied in dyeing, textiles, papermaking, plant fibers, etc. It can solve the problems of poor bonding fastness and no affinity of fibers, so as to improve the coloring depth, improve the bonding fastness, and overcome the sun exposure The effect of fastness
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[0018] Example 1
[0019] (1) Pour the pure cotton fabric into 4% polyvinylpyrrolidone (molecular weight 8000) solution with a mass fraction of solute, double dip and two rolls, with 100% remnant rate, dry at 80°C for 10 minutes, and cool down after drying. To room temperature, wash in hot water at 40°C for 15 minutes, then air dry naturally for later use;
[0020] (2) Use chestnut shell natural dyes to dye the textiles treated in step (1). The amount of natural dyes is 2% (owf), that is, 100 grams of textiles require 2g of natural dyes (here refers to 100 grams of non-step ( 1) The treated original textile requires 2g of natural dye, the same is true in the following examples), bath ratio 1:20 (here also refers to the ratio of the quality of the original textile without step (1) to the mass of the dye liquor, in the following examples The same is true), dyeing temperature is 50℃, dyeing time is 90min, after dyeing, the fabric is washed 3 times with water and air-dried naturally; ...
Example Embodiment
[0027] Example 2
[0028] (1) Padding the silk fabric in an aqueous solution of 8% polyvinylpyrrolidone (molecular weight of 55000) with a mass fraction of solute, two dipping and two rolling with a surplus rate of 80%, drying at 100°C for 5 minutes, and cooling to room temperature after drying ,Wash in hot water at 60℃ for 10min, then dry naturally for later use;
[0029] (2) Use mulberry natural dyes to dye the textiles treated in step (1). The amount of natural dyes is 4% (owf), that is, 100 grams of textiles require 4g natural dyes, bath ratio 1:50, dyeing temperature 100℃, Dyeing time is 30min. After dyeing, the fabric is washed 5 times with water and dried naturally;
[0030] (3) Immerse the natural dye-dyed fabric treated in step (2) in zinc acetate dihydrate solution, the amount of zinc acetate is 15% (owf), the bath ratio is 1:50, the immersion temperature is 70℃, the immersion time is 60min, and the immersion After the end, the rolls are rolled, and the rolling residual r...
Example Embodiment
[0036] Example 3
[0037] (1) Pour the wool fabric into a 6% polyvinylpyrrolidone (molecular weight: 30000) solution with a mass fraction of solute, two dips and two rolls, with a surplus rate of 90%, and dry at 90°C for 7 minutes. After drying, cool to room temperature ,Wash in hot water at 50℃ for 12min, then dry naturally for later use;
[0038] (2) Use gardenia yellow natural dye to dye the textile treated in step (1), the amount of natural dye is 3% (owf), that is, 100 grams of textile requires 3g natural dye, liquor ratio 1:40, dyeing temperature 80 ℃, dyeing time is 45min, after dyeing, the fabric is washed 4 times with water and dried naturally;
[0039] (3) Immerse the natural dye-dyed fabric treated in step (2) in a zinc acetate dihydrate solution, the amount of zinc acetate is 10% (owf), the bath ratio is 1:40, the immersion temperature is 60℃, the immersion time is 70min, and the immersion After the end, the rolls are rolled, and the rolling residual rate is 90%;
[0040...
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