Same-color dyeing method for real silk / cotton interwoven fabric by using gallnut plant dye

Abstract

The invention discloses a homochromatic dyeing method for real silk / cotton interwoven fabric by using gallnut plant dye, which comprises the following steps: (1) modification treatment: putting real silk / cotton interwoven fabric into a modification liquid for modification treatment, controlling the bath ratio to be 1: 15, the temperature to be 60-80 DEG C and the time to be 40-60 minutes during the modification treatment, and washing and drying the fabric after the treatment; (2) dyeing treatment: dyeing the real silk / cotton interwoven fabric subjected to modification treatment, wherein a formula of a dyeing solution comprises 1-5% (o.w.f) of gallnut plant dye, 1g / L of anhydrous sodium sulphate and the balance of water; washing and drying after dyeing; (3) mordanting: mordanting the dyed real silk / cotton interwoven fabric; washing and drying after mordanting. The dye is good in homochromatism, and the dyed fabric is not only good in various fastnesses, but also excellent in anti-ultraviolet performance.

Description

Technical Field

[0001] The invention relates to the technical field of textile dyeing and finishing, in particular to a method for dyeing a silk / cotton interwoven fabric in the same color using a gallnut plant dye. Background Art

[0002] Silk / cotton interwoven fabrics are produced using mulberry silk as the warp and cotton as the weft. They combine the luster, soft feel, and drape of silk with the moisture-wicking and breathable properties of cotton. Because silk and cotton are protein and cellulose fibers, respectively, they differ significantly in morphology, structure, and physical and chemical properties. This leads to significant differences in dyeing performance, and poor same-bath dyeing consistency. In other words, the K / S ratio of plant dyes for silk is significantly higher than that for cotton, affecting the overall quality of the fabric.

[0003] Epidemiological studies have confirmed that excessive UV exposure affects human health. In this context, developing functional textiles with a UPF (Ultraviolet Protection Factor) of 50+ or ​​higher not only provides an all-weather physical barrier but also reduces environmental pollution from chemical sunscreens, achieving both personal health protection and ecological sustainability.

[0004] Gallnuts are formed by the parasitic gall aphids on plants of the Anacardiaceae family. They are generally used in traditional Chinese medicine and can also be made into dyes. Modern research shows that gallnuts have antidiarrheal, antibacterial, anti-inflammatory, antioxidant, anti-aging, and antiviral pharmacological effects. Its core active ingredient, tannic acid, is a natural polyphenol compound with broad-spectrum UV absorption properties and a certain affinity for silk and cotton fibers. However, due to its uneven distribution between silk and cotton fibers, its dyeing has poor color consistency. Therefore, the development of a one-bath, efficient dyeing process suitable for silk / cotton interwoven fabrics will not only expand the industrial application scenarios of gallnuts, but also provide innovative solutions for functional textiles.

[0005] Currently, there are no reports on the use of modifier pretreatment to improve the same-color dyeing of silk / cotton interwoven fabrics and at the same time give the fabrics excellent UV resistance. Summary of the Invention

[0006] The present invention aims to provide a method for dyeing a silk / cotton interwoven fabric with a gallnut plant dye in the same color, so as to improve the same color property of the silk / cotton interwoven fabric with the gallnut plant dye. The dyed fabric not only has good fastness but also has excellent anti-ultraviolet performance.

[0007] The technical solution adopted by the present invention to solve its technical problem is: A method for dyeing a silk / cotton interwoven fabric in the same color using a gallnut plant dye comprises the following steps: (1) Modification treatment: The silk / cotton interwoven fabric is placed in a modifying liquid for modification treatment, with a bath ratio of 1:15, a temperature of 60-80°C, and a time of 40-60 minutes. After treatment, the fabric is washed and dried; (2) Dyeing treatment: The modified silk / cotton interwoven fabric is dyed, and the dye liquor formula is: 1-5% (owf) of gallnut plant dye, 1 g / L of sodium sulfate, and the balance of water; After dyeing, wash and dry; (3) Mordanting: The dyed silk / cotton interwoven fabric is mordanted, and the mordanting parameters are as follows: Mordant 1-5% (owf), bath ratio 1:15, temperature 60℃, time 30 min; Wash and dry after mordanting.

[0008] The modified liquid is composed of: 12-16 g / L of cationic modifier and the balance of water.

[0009] The specific model of the cationic modifier is HS-EW.

[0010] The dyeing parameters are: dyeing temperature of 80° C., dyeing time of 45-60 min, and bath ratio of 1:15.

[0011] The mordant is ferrous sulfate.

[0012] The beneficial effects of the present invention are: The present invention uses a specific modifier and a specific dyeing process to regulate the distribution of dyes on silk and cotton fibers, effectively reducing the significant color difference between silk and cotton fibers in traditional processes and improving the overall color uniformity of the fabric.

[0013] The invention utilizes the characteristics of the natural polyphenol components of gallnut to synchronously construct an ultraviolet absorption layer during the dyeing process, so that the fabric has long-term protection ability and reduces the harm of ultraviolet rays to human health.

[0014] (3) The present invention adopts all-natural plant dyes and environmentally friendly modification technology to avoid the residue of harmful chemicals and meet the production needs of green textiles.

[0015] (4) The present invention adopts a one-bath process for dyeing and UV protection, which significantly improves production efficiency and resource utilization. The market prospect is very broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the effect of modifier concentration on homochromy; Figure 2 is the effect of modification temperature on homochromy; Figure 3 is the effect of modification time on homochromy; Figure 4 is the effect of modifier dosage on Zeta potential; Figure 5 It is the effect of dyeing method on homochromy; Figure 6 It is the effect of dyeing pH on homochromy; Figure 7 It is the effect of dyeing temperature on homochromy; Figure 8 is the effect of dye concentration on homochromy; Figure 9 It is the effect of dyeing time on homochromy; Figure 10 It is the influence of the type of mordant on homochromy. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described in detail below through specific embodiments.

[0018] In the present invention, unless otherwise specified, the raw materials and equipment used can be purchased from the market or are commonly used in the art. The methods in the following examples, unless otherwise specified, are all conventional methods in the art.

[0019] Gallnut plant dyes were commercially available and purchased from Changzhou Meisheng Biological Co., Ltd. and Shanghai Huiran Biotechnology Co., Ltd.

[0020] The cationic modifier is commercially available, model HS-EW, product name: modifier HS-EW or cross-linking agent HS-EW (commercially available, manufacturer: Zhongshan Hongsheng Biotechnology Co., Ltd.).

[0021] Example 1 A method for dyeing a silk / cotton interwoven fabric in the same color using a gallnut plant dye comprises the following steps: (1) Modification treatment: The silk / cotton interwoven fabric (the mass ratio of silk to cotton is 50:50) was placed in a 14 g / L solution of the modifier HS-EW. The bath ratio was 1:15, the temperature was 80 °C, and the treatment time was 60 min. After treatment, the fabric was washed and dried.

[0022] (2) Dyeing treatment: The amount of gallnut plant dye used is 1% (owf), and the fabric is placed in the dye solution for 60 minutes. The sodium sulfate is 1 g / L, the temperature is 80 ℃, and the bath ratio is 1:15. After treatment, the fabric is washed and dried.

[0023] (3) Post-mordant dyeing treatment: The above-mentioned silk / cotton interwoven fabric was placed in a 5% (owf) ferrous sulfate solution for treatment, with the bath ratio controlled at 1:15, the temperature at 60 °C, and the time at 30 min. After treatment, the fabric was washed and dried to obtain a silk / cotton interwoven fabric with good color consistency and anti-ultraviolet function.

[0024] After testing, the color balance value K of silk / cotton interwoven fabric is 1.076, the UPF (ultraviolet protection factor) value is 88.14, and the UVA transmittance of the fabric is 1.78. After 20 soap washings, the UPF (ultraviolet protection factor) value of silk / cotton interwoven fabric is 77.51, and the UVA transmittance of the fabric is 3.03.

[0025] According to the "Evaluation of UV Protection Performance of Textiles" standard issued by the General Administration of Quality Supervision, Inspection and Quarantine, the UPF value of the sample in this embodiment is greater than 40 and the UVA transmittance is less than 5%, so it complies with the relevant regulations and is an anti-ultraviolet product.

[0026] Example 2 A method for dyeing a silk / cotton interwoven fabric in the same color using a gallnut plant dye comprises the following steps: (1) Modification treatment: The silk / cotton interwoven fabric (the mass ratio of silk to cotton is 50:50) was placed in a 14 g / L solution of the modifier HS-EW. The bath ratio was 1:15, the temperature was 70 °C, and the treatment time was 50 min. After treatment, the fabric was washed and dried.

[0027] (2) Dyeing treatment: The amount of gallnut plant dye used is 3% (owf), and the fabric is placed in the dye solution for 50 minutes. The concentration of sodium sulfate is 1 g / L, the temperature is 80 ℃, and the bath ratio is 1:15. After treatment, the fabric is washed and dried.

[0028] (3) Post-mordant dyeing treatment: The above-mentioned silk / cotton interwoven fabric was placed in a 5% (owf) ferrous sulfate solution for treatment, with the bath ratio controlled at 1:15, the temperature at 60 °C, and the time at 30 min. After treatment, the fabric was washed and dried to obtain a silk / cotton interwoven fabric with good color consistency and anti-ultraviolet function.

[0029] Testing revealed that the silk / cotton interwoven fabric had a color balance value (K) of 1.083, a UPF (Ultraviolet Protection Factor) of 92.45, and a UVA transmittance of 0.98. After 20 washes, the silk / cotton interwoven fabric had a UPF (Ultraviolet Protection Factor) of 83.04 and a UVA transmittance of 2.13.

[0030] According to the "Evaluation of UV Protection Performance of Textiles" standard issued by the General Administration of Quality Supervision, Inspection and Quarantine, the UPF value of the sample in this embodiment is greater than 40 and the UVA transmittance is less than 5%, so it complies with the relevant regulations and is an anti-ultraviolet product.

[0031] Example 3 A method for dyeing a silk / cotton interwoven fabric in the same color using a gallnut plant dye comprises the following steps: (1) Modification treatment: The silk / cotton interwoven fabric (the mass ratio of silk to cotton is 50:50) was placed in a 16 g / L HS-EW solution with a bath ratio of 1:15, a temperature of 60 °C, and a treatment time of 40 min. After treatment, the fabric was washed and dried.

[0032] (2) Dyeing treatment: The amount of gallnut plant dye used is 5% (owf), and the fabric is placed in the dye solution for 45 minutes. The sodium sulfate is 1 g / L, the temperature is 80 ℃, and the bath ratio is 1:15. After treatment, the fabric is washed and dried.

[0033] (3) Post-mordant dyeing treatment: The above-mentioned silk / cotton interwoven fabric was placed in a 3% (owf) ferrous sulfate solution for treatment, with the bath ratio controlled at 1:15, the temperature at 60 °C, and the time at 30 min. After treatment, the fabric was washed and dried to obtain a silk / cotton interwoven fabric with good color consistency and anti-ultraviolet function.

[0034] Testing revealed that the silk / cotton interwoven fabric had a color balance value (K) of 1.101, a UPF (Ultraviolet Protection Factor) of 93.19, and a UVA transmittance of 1.13. After 20 washes, the silk / cotton interwoven fabric had a UPF (Ultraviolet Protection Factor) of 81.08 and a UVA transmittance of 2.30.

[0035] According to the "Evaluation of UV Protection Performance of Textiles" standard issued by the General Administration of Quality Supervision, Inspection and Quarantine, the UPF value of the sample in this embodiment is greater than 40 and the UVA transmittance is less than 5%, so it complies with the relevant regulations and is an anti-ultraviolet product.

[0036] Example 4 A method for dyeing a silk / cotton interwoven fabric in the same color using a gallnut plant dye comprises the following steps: (1) Modification treatment: The silk / cotton interwoven fabric (silk: cotton mass ratio 50:50) was placed in a modifier HS-EW solution with a mass concentration of 12 g / L. The bath ratio was 1:15, the temperature was 70 °C, and the treatment time was 50 min. After treatment, the fabric was washed and dried.

[0037] (2) Dyeing treatment: The amount of gallnut plant dye used is 3% (owf), and the fabric is placed in the dye solution for 50 minutes. The concentration of sodium sulfate is 1 g / L, the temperature is 80 ℃, and the bath ratio is 1:15. After treatment, the fabric is washed and dried.

[0038] (3) Post-mordant dyeing treatment: The above-mentioned silk / cotton interwoven fabric was placed in a 3% (owf) ferrous sulfate solution for treatment, with the bath ratio controlled at 1:15, the temperature at 60 °C, and the time at 30 min. After treatment, the fabric was washed and dried to obtain a silk / cotton interwoven fabric with good color consistency and anti-ultraviolet function.

[0039] Testing revealed that the silk / cotton interwoven fabric had a color balance value (K) of 0.901, a UPF (Ultraviolet Protection Factor) of 91.87, and a UVA transmittance of 1.34. After 20 washes, the silk / cotton interwoven fabric had a UPF (Ultraviolet Protection Factor) of 80.80 and a UVA transmittance of 2.43.

[0040] According to the "Evaluation of UV Protection Performance of Textiles" standard issued by the General Administration of Quality Supervision, Inspection and Quarantine, the UPF value of the sample in this embodiment is greater than 40 and the UVA transmittance is less than 5%, so it complies with the relevant regulations and is an anti-ultraviolet product.

[0041] Example 5 A method for dyeing a silk / cotton interwoven fabric in the same color using a gallnut plant dye comprises the following steps: (1) Modification treatment: The silk / cotton interwoven fabric (the mass ratio of silk to cotton is 50:50) was placed in a 16 g / L solution of the modifier HS-EW. The bath ratio was 1:15, the temperature was 80 °C, and the treatment time was 40 min. After treatment, the fabric was washed and dried.

[0042] (2) Dyeing treatment: The amount of gallnut plant dye used is 1% (owf), and the fabric is placed in the dye solution for 60 minutes. The sodium sulfate is 1 g / L, the temperature is 80 ℃, and the bath ratio is 1:15. After treatment, the fabric is washed and dried.

[0043] (3) Post-mordant dyeing treatment: The above-mentioned silk / cotton interwoven fabric was placed in a 1% (owf) ferrous sulfate solution for treatment, with the bath ratio controlled at 1:15, the temperature at 60 °C, and the time at 30 min. After treatment, the fabric was washed and dried to obtain a silk / cotton interwoven fabric with good color consistency and anti-ultraviolet function.

[0044] Testing revealed that the silk / cotton interwoven fabric had a color balance value (K) of 1.103, a UPF (Ultraviolet Protection Factor) of 87.39, and a UVA transmittance of 1.84. After 20 washes, the silk / cotton interwoven fabric had a UPF (Ultraviolet Protection Factor) of 76.03 and a UVA transmittance of 3.11.

[0045] According to the "Evaluation of UV Protection Performance of Textiles" standard issued by the General Administration of Quality Supervision, Inspection and Quarantine, the UPF value of the sample in this embodiment is greater than 40 and the UVA transmittance is less than 5%, so it complies with the relevant regulations and is an anti-ultraviolet product.

[0046] Example 6 A method for dyeing a silk / cotton interwoven fabric in the same color using a gallnut plant dye comprises the following steps: (1) Modification treatment: The silk / cotton interwoven fabric (silk: cotton mass ratio 50:50) was placed in a modifier HS-EW solution with a mass concentration of 16 g / L. The bath ratio was 1:15, the temperature was 80 °C, and the treatment time was 60 min. After treatment, the fabric was washed and dried.

[0047] (2) Dyeing treatment: The amount of gallnut plant dye used is 5% (owf), and the fabric is placed in the dye solution for 60 minutes. The sodium sulfate is 1 g / L, the temperature is 80 ℃, and the bath ratio is 1:15. After treatment, the fabric is washed and dried.

[0048] (3) Post-mordant dyeing treatment: The above-mentioned silk / cotton interwoven fabric was placed in a 1% (owf) ferrous sulfate solution for treatment, with the bath ratio controlled at 1:15, the temperature at 60 °C, and the time at 30 min. After treatment, the fabric was washed and dried to obtain a silk / cotton interwoven fabric with good color consistency and anti-ultraviolet function.

[0049] Testing revealed that the silk / cotton interwoven fabric had a color balance value (K) of 0.912, a UPF (Ultraviolet Protection Factor) of 88.39, and a UVA transmittance of 1.81. After 20 washes, the silk / cotton interwoven fabric had a UPF (Ultraviolet Protection Factor) of 76.20 and a UVA transmittance of 3.18.

[0050] According to the "Evaluation of UV Protection Performance of Textiles" standard issued by the General Administration of Quality Supervision, Inspection and Quarantine, the UPF value of the sample in this embodiment is greater than 40 and the UVA transmittance is less than 5%, so it complies with the relevant regulations and is an anti-ultraviolet product.

[0051] Comparative Example 1: The difference between this example and Example 4 is that no modification treatment was performed, but the fabric was directly dyed with gallnut plant dye. The resulting silk / cotton interwoven fabric had a lighter overall color and poor color matching. After testing, the color matching balance value K of the silk / cotton interwoven fabric was 1.75.

[0052] Comparative Example 2: This example differs from Example 4 in that pomegranate peel plant dye (commercially available from Meisheng Bio or Huiran Bio) was used instead of gallnut plant dye. Testing showed that the silk / cotton interwoven fabric had a color balance value, K, of 0.796. The UPF (Ultraviolet Protection Factor) value was 75.7, and the fabric's UVA transmittance was 1.31. After 20 washes, the silk / cotton interwoven fabric had a UPF (Ultraviolet Protection Factor) value of 65.89, and a UVA transmittance of 1.35.

[0053] Experimental part: Figure 1-3 The effect of modification process on the dyeing homochromy of silk / cotton interwoven fabrics. Figure 1 It can be seen that (modifier 4-16 g / L, bath ratio 1:15, temperature 80 ℃, time 60 min), as the amount of modifier increases, the K / S value of silk and cotton increases. When the modifier concentration is 12-16 g / L, the color homogeneity is the best. Figure 2 (Modifier 16 g / L, bath ratio 1:15, 50-90°C, time 60 min) It can be seen that the homochromy is best when the temperature is 60-80°C. Figure 3 (Modifier 16 g / L, bath ratio 1:15, 80°C, time 20-60 min) It can be seen that the homochromy is best when the time is 40-60 minutes.

[0054] from Figure 4 (Modifier 0-16 g / L, bath ratio 1:15, 60℃*40min) It can be seen that the Zeta potential increases with the increase of modifier concentration, and the Zeta potential is the highest when it is 12-16 g / L.

[0055] Figure 5-10 It is the influence of dyeing method and dyeing process parameters on the dyeing homochromy of silk / cotton interwoven fabrics.

[0056] Figure 5 The direct dyeing methods (without post-mordant treatment) are: (1) Modification treatment: The silk / cotton interwoven fabric (the mass ratio of silk to cotton is 50:50) was placed in a 14 g / L solution of the modifier HS-EW. The bath ratio was 1:15, the temperature was 70 °C, and the treatment time was 50 min. After treatment, the fabric was washed and dried.

[0057] (2) Dyeing treatment: The amount of gallnut plant dye used is 1% (owf), and the fabric is placed in the dye solution for 50 minutes. The concentration of sodium sulfate is 1 g / L, the temperature is 80 ℃, and the bath ratio is 1:15. After treatment, the fabric is washed and dried.

[0058] The pre-media method is: (1) Modification treatment: The silk / cotton interwoven fabric (the mass ratio of silk to cotton is 50:50) was placed in a 14 g / L solution of the modifier HS-EW. The bath ratio was 1:15, the temperature was 70 °C, and the treatment time was 50 min. After treatment, the fabric was washed and dried.

[0059] (2) Mordanting treatment: The above-mentioned silk / cotton interwoven fabric was placed in a 3% (owf) ferrous sulfate solution for treatment, with the bath ratio controlled at 1:15, the temperature at 60 °C, and the time at 30 min. After treatment, the fabric was washed and dried.

[0060] (3) Dyeing treatment: The amount of gallnut plant dye used is 1% (owf), and the fabric is placed in the dye solution for 50 minutes. The sodium sulfate is 1 g / L, the temperature is 80 ℃, and the bath ratio is 1:15. After treatment, the fabric is washed and dried.

[0061] The bathing method is: (1) Modification treatment: The silk / cotton interwoven fabric (the mass ratio of silk to cotton is 50:50) was placed in a 14 g / L solution of the modifier HS-EW. The bath ratio was 1:15, the temperature was 70 °C, and the treatment time was 50 min. After treatment, the fabric was washed and dried.

[0062] (2) Same bath: Use 1% (owf) gallnut plant dye, 1 g / L sodium sulfate, and 3% (owf) ferrous sulfate. Place the fabric in the dye solution and dye for 50 minutes at a temperature of 80°C. The bath ratio is 1:15. After treatment, wash the fabric and dry it.

[0063] The post-media method (the present invention) is: (1) Modification treatment: The silk / cotton interwoven fabric (the mass ratio of silk to cotton is 50:50) was placed in a 14 g / L solution of the modifier HS-EW. The bath ratio was 1:15, the temperature was 70 °C, and the treatment time was 50 min. After treatment, the fabric was washed and dried.

[0064] (2) Dyeing treatment: The amount of gallnut plant dye used is 1% (owf), and the fabric is placed in the dye solution for 50 minutes. The concentration of sodium sulfate is 1 g / L, the temperature is 80 ℃, and the bath ratio is 1:15. After treatment, the fabric is washed and dried.

[0065] (3) Post-mordant dyeing treatment: The above-mentioned silk / cotton interwoven fabric was placed in a 3% (owf) ferrous sulfate solution for treatment, with the bath ratio controlled at 1:15, the temperature at 60 °C, and the time at 30 min. After treatment, the fabric was washed and dried.

[0066] from Figure 5 It can be seen that the post-mordanting method has a high K / S value and good color consistency.

[0067] The effect of different pH values ​​on color Figure 6 (1% gallnut, 1 g / L sodium sulfate, 80℃*60min, bath ratio 1:15) It can be seen that when the pH value is around 7, the color homochromy is best.

[0068] The influence of different dyeing temperatures on homochromy Figure 7 (1% gallnut, 1 g / L sodium sulfate, pH 7, 60 min, bath ratio 1:15) It can be seen that the color is good at 80℃ and the energy consumption is low.

[0069] Effects of different gallnut plant dye dosages on color consistency, from Figure 8 (Sodium sulfate 1 g / L, pH 7, 80℃*60min, bath ratio 1:15) It can be seen that the gallnut plant dye has good color consistency when the content is 1-5%.

[0070] The effect of different dyeing time on homochromy Figure 9 (1% gallnut, 1 g / L sodium sulfate, pH 7, 80°C, bath ratio 1:15) It can be seen that the best color consistency is achieved when the dyeing time is 45-60 minutes.

[0071] Figure 10 The processing method is: (1) Modification treatment: The silk / cotton interwoven fabric (the mass ratio of silk to cotton is 50:50) was placed in a 14 g / L solution of the modifier HS-EW. The bath ratio was 1:15, the temperature was 70 °C, and the treatment time was 50 min. After treatment, the fabric was washed and dried.

[0072] (2) Dyeing treatment: The amount of gallnut plant dye used is 1% (owf), and the fabric is placed in the dye solution for 50 minutes. The concentration of sodium sulfate is 1 g / L, the temperature is 80 ℃, and the bath ratio is 1:15. After treatment, the fabric is washed and dried.

[0073] (3) Post-mordant dyeing treatment: The above-mentioned silk / cotton interwoven fabric was placed in a 3% (owf) mordant solution (the control was treated without adding mordant), with the bath ratio controlled at 1:15, the temperature at 60 °C, and the time at 30 min. After treatment, the fabric was washed and dried.

[0074] from Figure 10It can be seen that different mordants have a great influence on the homochromy, and ferrous sulfate as a mordant has the best homochromy.

[0075] The embodiment described above is only a preferred solution of the present invention and does not limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solution described in the claims.

Claims

1. A method for dyeing a silk / cotton interwoven fabric with a gallnut plant dye, characterized in that: The steps include: (1) Modification treatment: The silk / cotton interwoven fabric is placed in a modifying liquid for modification treatment, with a bath ratio of 1:15, a temperature of 60-80°C, and a time of 40-60 minutes. After treatment, the fabric is washed and dried; (2) Dyeing treatment: The modified silk / cotton interwoven fabric is dyed, and the dye liquor formula is: 1-5% (owf) of gallnut plant dye, 1 g / L of sodium sulfate, and the balance of water; After dyeing, wash and dry; (3) Mordanting: The dyed silk / cotton interwoven fabric is mordanted, and the mordanting parameters are as follows: Mordant 1-5% (owf), bath ratio 1:15, temperature 60℃, time 30 min; Wash and dry after mordanting.

2. The method for dyeing the same color as claimed in claim 1, wherein: The modified liquid is composed of: 12-16 g / L of cationic modifier and the balance of water.

3. The same color dyeing method according to claim 2, characterized in that The specific model of the cationic modifier is HS-EW.

4. The method for dyeing the same color as claimed in claim 1, wherein: The dyeing parameters are: dyeing temperature of 80° C., dyeing time of 45-60 min, and bath ratio of 1:

15.

5. The method for dyeing the same color as claimed in claim 1, wherein: The mordant is ferrous sulfate.

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