Method for improving sweat-light fastness of bright red fabric
Through long-distance continuous rolling and dyeing technology, combined with dispersion, reduction and the use of reactive dyes, the problem of taking into account the sweat fastness and color brightness of the red fabric is solved, and higher sweat fastness and color durability are achieved.
Patent Information
- Application Number
- CN202411508720.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-03-04
AI Technical Summary
The existing red fabrics are difficult to balance the sweat fastness and color brightness. The sweat fastness is poor when dyeing reactive dyes, while the color is dark when dyeing reductive dyes.
The long-distance continuous rolling and dyeing technology is adopted to dip the fabric and reduce the mixed dye liquid through one immersion and one rolling method. After the reduction liquid is plunged and developed, the reactive dye dye liquid is then plunged, and finally the post-organization working liquid is sorted, and the finished product is dried with tensile.
The sweat fastness of the red fabric is improved, so that it can still maintain level 4 standards after 120 hours of exposure to the sun, and the colors are bright and lasting, meeting market demand.
Smart Images
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Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of fabric printing and dyeing, and particularly relates to a method for improving the sweat and light fastness of bright red fabric. Background Art
[0002] Sweat and light fastness, also known as light and sweat composite color fastness or sweat and light color fastness, refers to the ability of textiles to maintain their original color under the combined effects of human sweat and sunlight during wearing. This performance is one of the important indicators for evaluating the quality of textiles, especially in daily wear and outdoor activities. Whether the color of textiles can remain bright and stable is directly related to consumers' wearing experience and the service life of the product.
[0003] Polyester cotton, CVC antistatic fabric is the preferred fabric for oilfield work clothes. The colors of work clothes for different companies and different positions may be different, but in recent years, bright and eye-catching colors such as red and blue have gradually become the mainstream to improve the visibility of workers in the working environment. Bright red is one of the standard colors of work clothes of CNPC Group. The color is bright and eye-catching. Due to its color characteristics, disperse / reactive dyeing is usually used. Reactive dyes themselves have poor perspiration light fastness and are easy to fade when worn outdoors. They are easy to stain light-colored clothes after sweating. However, although the perspiration light fastness of vat dyeing is good, the color is dark.
[0004] In addition, although the red fabric currently on the market can still reach the level 4 standard for sweat and light fastness after being exposed to the sun for 20 hours, the sweat and light fastness will drop to only level 2 to 3 after being exposed to the sun for a longer time, such as 120 hours, which cannot meet the needs of the market. Summary of the invention
[0005] The technical problem to be solved by the present invention is that it is currently impossible to balance the perspiration light fastness and color brightness of fabrics in the market. The purpose is to provide a method for improving the perspiration light fastness of bright red fabrics, which solves the problem that the bright red fabrics dyed with reactive dye solution have bright colors but poor perspiration light fastness, while the perspiration light fastness of red fabrics dyed with vat dyes is good but the color is dull.
[0006] The present invention is achieved through the following technical solutions:
[0007] A method for improving the perspiration and light fastness of scarlet fabrics, using a long-machine continuous pad dyeing technology, comprises the following steps:
[0008] S1, firstly immerse the fabric into a dispersed and reduced mixed dye solution, wherein the dispersed and reduced mixed dye solution comprises sodium sulfate; then immerse the fabric into a reduced solution for color development, wherein the reduced solution comprises soda ash and sodium hydrosulfite;
[0009] S2, then padding a reactive dye solution, wherein the reactive dye solution includes sodium sulfate, drying, and padding a reactive color fixing solution;
[0010] S3, finally, the finished product is dipped in the finishing working liquid and stretched and dried.
[0011] Furthermore, the long-machine continuous padding technology adopts a one-immersion-one-pad method, with a machine speed of 50-80 M / min and a padding rate of 40%-50%.
[0012] Furthermore, the process of step S1 is: first immersing and rolling disperse / reduced dye solution, drying with three sets of hot air drying fans, high temperature baking, cold water roller cooling, then immersing and rolling with reduced solution, steaming and coloring in a steamer, three-grid cold water washing, hydrogen peroxide oxidation, soap washing, water washing, and drying in a drying cylinder.
[0013] Furthermore, the dispersed and reduced mixed dye solution also includes reduced red FBB, reduced brilliant orange GR and anti-migration agent ST200A; wherein the concentration of reduced red FBB is 5-30 g / l, the concentration of reduced brilliant orange GR is 10-30 g / l, the concentration of sodium sulfate is 50 g / l, and the concentration of anti-migration agent ST200A is 5 g / l.
[0014] Furthermore, the disperse and reduce mixed dye solution also includes disperse red HL-2GLA and disperse yellow SE-4RL; wherein the concentration of disperse red HL-2GLA is 10-80 g / l, and the concentration of disperse yellow SE-4RL is 0-20 g / l.
[0015] Furthermore, the process of step S2 is: padding with reactive dye solution, three groups of hot air drying, padding with reactive color fixing solution, steaming and fixing in a steamer, hot water washing, soap washing, cold water washing, and drying.
[0016] Furthermore, the reactive dye solution also includes reactive red M2B and anti-migration agent ST200A, wherein the concentration of reactive red M2B is 5-20 g / l, the concentration of glauber salt is 40-50 g / l, and the concentration of anti-migration agent ST200A is 5 g / l.
[0017] Furthermore, the active color fixing solution comprises 200 g / l of industrial NaCl, 20 g / l of soda ash, 5 g / l of caustic soda and 5 g / l of resist salt.
[0018] Furthermore, the post-finishing working solution includes 20-40 g / l of anti-ultraviolet finishing agent CTA-760A and 20-30 g / l of color fixing agent MJ611.
[0019] Furthermore, in step S3, the tentering and drying temperature is 140-150°C.
[0020] Compared with the prior art, the present invention has the following advantages and beneficial effects:
[0021] 1. The present invention uses a long-machine continuous tie-dyeing process to perform dispersed reduction mixed dyeing and active dyeing on the bright red fabric, which ensures uniform dyeing on the one hand and higher sweat and light fastness and stable performance after dyeing on the other hand.
[0022] 2. The present invention adopts a mixture of soda ash and insurance powder as a reducing agent for vat red FBB. Compared with the existing method of using caustic soda and insurance powder as reducing agents, the combination of soda ash and insurance powder can improve the brightness of vat red FBB on the one hand, and ensure the sweat and light fastness of bright red fabrics on the other hand.
[0023] 3. Adding sodium sulfoxide to both the reactive dye solution and the disperse dye solution can help the dye enter the fiber, improve the dyeing transparency, and further improve the light fastness to sweat.
[0024] 4. According to GB / T14576-2009 standard, after experiments, the sweat light fastness of the existing red fabric in the market after exposure for 120 hours is only 2-3 levels, that is, the color difference between the original sample after exposure is 2-3 levels, while the sweat light fastness of the fabric produced by the present invention after exposure for 120 hours can reach 4 levels, that is, the color difference between the sample before exposure and the sample after exposure is 4 levels. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments. The illustrative embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.
[0026] Example 1
[0027] This embodiment is applicable to dyeing scarlet fabrics containing cotton fibers or polyester fibers.
[0028] In this embodiment, the long machine continuous tie-dyeing technology adopts a one-dip and one-roll method, and the machine speed is 60M / min.
[0029] S1, first disperse / vat dye the fabric in the first step: dip the semi-finished product off the mercerizing machine into disperse / vat dye solution, wherein the disperse / vat dye solution includes disperse red HL-2GLA (Zhejiang Shengyu) 30g / l, disperse yellow (Longsheng) SE-4RL 10g / l, vat red FBB (Wold) 15g / l, vat brilliant orange GR (Wold) 25g / l, sodium sulfate 50g / l and anti-migration agent ST200A 5g / l; in this process, disperse dyes and vat dyes are mixed together for dyeing, which saves process flow on the one hand, and reduces dyeing depth on the other hand, so as to facilitate subsequent brightening operation.
[0030] Then three groups of hot air drying fans are used for drying, and the drying temperatures are: 90℃, 120℃ and 170℃, respectively, and then baked at 215℃ for 100 seconds, cooled by cold water rollers, and padded with reducing solution for color development, wherein the reducing solution includes 30g / l of soda ash and 30g / l of hydrosulfite;
[0031] Steam color development in a steam box, the steaming temperature is 100℃, the time is 90 seconds, three grids of cold water washing, two grids of hydrogen peroxide oxidation, where the hydrogen peroxide concentration is 3g / l, two grids of 90℃ water temperature soap washing, cold water washing, and drying in a drying cylinder.
[0032] Specifically, the semi-finished mercerized product is immersed in the dye solution and then pressed with a roller to squeeze the dye solution into the interstices of the fabric, while squeezing out the excess dye solution on the fabric. The dye is then applied to the fibers through post-treatments such as steaming or baking. The fabric is dyed by tie-dyeing, the dye enters the fiber, and then the color is restored with a reducing liquid to ensure uniform dyeing of the fabric, making the color more vivid and lasting. In addition, the dyeing effect can be precisely controlled by controlling the dyeing temperature, time, pressure and other parameters to meet the needs of different customers.
[0033] S2, re-dyeing with reactive dye solution: completing the step S1 of padding the semi-finished product with reactive dye solution, wherein the reactive dye solution comprises 10 g / l of reactive red M2B (Runtu), 50 g / l of sodium sulfate and 5 g / l of anti-migration agent ST200A; drying with three groups of hot air drying fans, the drying temperatures are: 90° C., 120° C. and 170° C. in sequence, padding with reactive color fixing solution, wherein the reactive color fixing solution comprises 200 g / l of industrial salt, 20 g / l of soda ash, 5 g / l of caustic soda and 5 g / l of resist salt S, steaming in a steamer for color development, the steaming temperature is 100-102° C., and the time is 80 seconds; then three-grid cold water washing, two-grid soap washing at 95° C. water temperature, two-grid cold water washing, and drying.
[0034] Specifically, reactive dyes have excellent dyeing properties, and overdyeing can make full use of this advantage. The semi-finished products off the machine can be immersed in reactive dye solution to make the colors on the fabric more vivid and eye-catching, ultimately enriching the color levels and pattern effects, and improving the dyeing effect and color fastness.
[0035] S3, finally finishing: the fabric produced through the above two processes is dipped into the finishing working solution, the finishing working solution includes 30g / l of anti-ultraviolet finishing agent CTA-760A (Beijing Zhongfang) and 20g / l of fixing agent MJ611, and the finished product is stretched and dried at a stretching temperature of 140°C.
[0036] Through the finishing process of tentering and shaping, the feel and drape of the fabric can be improved, and the product quality can be improved. In addition, the anti-ultraviolet finishing agent CTA-760A is a nano-inorganic compound that can strongly absorb ultraviolet rays, thereby improving the perspiration and light fastness of the fabric.
[0037] Example 2
[0038] This embodiment is applicable to dyeing scarlet fabrics containing cotton fibers or polyester fibers.
[0039] This embodiment adopts long-machine continuous tie-dyeing technology, adopts a one-dip-one-roll method, and the machine speed is 80M / min.
[0040] S1, first disperse / vat dye the fabric in the first step: dip the mercerized semi-finished product into the vat dye solution, wherein the disperse and vat mixed dye solution includes vat red FBB 18g / l, vat brilliant orange GR 30g / l, sodium sulfate 50g / l and anti-migration agent ST200A5g / l; in addition, the disperse dye solution is for dyeing polyester fibers, and when there is no polyester fiber in the fabric, disperse dye may not be added. No disperse dye solution is added in this embodiment 2.
[0041] Three groups of hot air drying fans are used for drying, and the drying temperatures are 90℃, 120℃ and 170℃ respectively, and then baked at 210℃ for 100 seconds, cooled by cold water rollers, and color developed by immersion and rolling in reducing liquid, wherein the reducing liquid includes 40g / l soda ash and 40g / l insurance powder, and color developed by steaming in a steam box, and the steaming temperature is 102℃ for 80 seconds, washed with cold water in three grids, oxidized with hydrogen peroxide in two grids, wherein the concentration of hydrogen peroxide is 2.5g / l, soap washed with 90℃ water temperature in two grids, washed with cold water, and dried in a drying cylinder.
[0042] S2, re-dyeing with reactive dye solution: completing the step S1, padding the semi-finished product with reactive dye solution, wherein the reactive dye solution includes 10 g / l reactive red M2 and 50 g / l sodium sulfate, drying with three groups of hot air drying fans, and the drying temperatures are 90° C., 120° C. and 170° C. respectively, and then padding with reactive color fixing solution, wherein the reactive color fixing solution includes 200 g / l industrial salt NaCl, 20 g / l soda ash, 5 g / l caustic soda and 5 g / l resist salt S, and steaming in a steamer for color development, the steaming temperature is 102° C., and the time is 60 seconds; then three-grid cold water washing, two-grid 90° C. hot water soap washing, two-grid cold water washing, and drying.
[0043] S3, finally finishing: the fabric produced through the above two processes is dipped into the finishing working solution, the finishing working solution includes 30g / l of anti-ultraviolet finishing agent CTA-760A and 10g / l of fixing agent MJ611, and the finished product is stretched and dried at a stretching temperature of 150 degrees.
[0044] Example 3 Comparative Experiment
[0045] (1) Effect of different dye components on sweat and light fastness
[0046] Specifically, the dyeing process for the cloth is as follows:
[0047] Two identical fabrics were respectively dipped in disperse red HL-2GLA dye and disperse red PUD-BS for dyeing, and divided into group A and group B. Afterwards, the two groups of fabrics were dried with a hot air drying fan at 210℃, steamed in a steamer for color development, washed with cold water, oxidized with hydrogen peroxide, where the concentration of hydrogen peroxide was 3g / l, soaped at 90℃, washed with cold water, and dried in a drying cylinder. According to the test standard GB / T14576-2009, the two groups of fabrics were tested for sweat light fastness. The specific results are shown in Table 1:
[0048] Table 1 Different dye components
[0049]
[0050] The experiment found that different dye components have an effect on the perspiration light fastness, and it was found that group A has better perspiration light fastness than group B. Therefore, it can be known that disperse red HL-2GLA can improve the perspiration light fastness of fabrics. Conclusion: Disperse red HL-2GLA used in the present invention has extremely high light resistance, can maintain color stability under long-term sunlight exposure, and is not easy to fade.
[0051] (2) Effect of reducing solution on the brightness of bright red fabric
[0052] Specifically, the fabric dyeing process is as follows:
[0053] Two identical fabrics were immersed in reducing liquid, which was 30g / l of reducing red FBB. After that, the two groups of fabrics were dried by hot air drying fan at 210℃, cooled by cold water roller, and immersed in different reducing liquids for color development. The fabrics were divided into group C and group D. The reducing liquid of group C included 30g / l of soda ash and 30g / l of insurance powder, and the reducing liquid of group D included 30g / l of caustic soda and 30g / l of insurance powder. The specific results are shown in Table 2:
[0054] Table 2 Effect of reducing liquid on the brightness of bright red fabric
[0055]
[0056] Conclusion: Currently, dyeing factories all choose caustic soda and insurance powder as reducing agents. Experiments have found that when this application uses a mixture of soda ash and insurance powder as the reducing agent of vat red FBB, it can achieve the effect of improving the brightness of vat red FBB without destroying the original perspiration light fastness. By comparison, the CIE chroma C value of group C is higher and the color is brighter. It can be seen that the reducing agent selected in this scheme not only ensures the stability of the perspiration light fastness of the fabric itself, but also solves the problem of insufficient brightness of vat dyes dyeing bright red.
[0057] (3) Effect of glauber powder on perspiration light fastness
[0058] Comparative Example 1:
[0059] The steps of this comparative example 1 are basically the same as those of the embodiment 1, except that no sodium sulfate is added to the dispersed and reduced mixed dye liquor and the reactive dye liquor in comparative example 1. The specific results are shown in Table 3.
[0060] Table 3 Effect of glauber's salt on perspiration light fastness
[0061]
[0062] Conclusion: Compared with the case without adding glauber salt, the solution of adding glauber salt to disperse / reduced dye liquor and reactive dye liquor has better perspiration light fastness. Specifically, adding glauber salt to both reactive dye liquor and disperse dye liquor is conducive to the dye entering the fiber, and the dyeing transparency is good, thereby further improving the perspiration light fastness.
[0063] (4) Effect of post-finishing liquid on perspiration and light fastness
[0064] Comparative Example 2: The steps of Comparative Example 2 are basically the same as those of Example 1, except that no post-finishing working liquid CTA-760A is added in Comparative Example 2. The specific results are shown in Table 4.
[0065] Table 4 Effect of post-finishing liquid on perspiration and light fastness
[0066]
[0067] Conclusion: The fabric needs to be fixed in the post-finishing process to improve the fastness and stability of dyeing. The conventional method is to add the fixing agent MJ611. However, in addition to adding the fixing agent MJ611, the present invention continues to add the anti-ultraviolet finishing agent CTA-
[0068] 760A (Beijing Zhongfang), after comparison, the fabric with added anti-ultraviolet finishing agent CTA-760A (Beijing Zhongfang) has better sweat and light fastness.
[0069] (5) Comparison of the conventional scarlet fabric dyeing process and the process of Example 1 of the present invention
[0070] Comparative Example 3: Using conventional scarlet fabric dyeing process
[0071] Specifically, the conventional disperse / active two-bath dyeing process is as follows:
[0072] 1. Pad disperse dye liquor, the disperse dye liquor includes: disperse red PUD-BS (Anochi) 10-80g / l, disperse yellow SE-4RL (Longsheng) 0-20g / l and anti-migration agent ST200A 5g / l, three sets of hot air drying (drying temperatures are 90-100℃, 120-140℃, 170℃ respectively), high temperature baking (210-215℃), padding reduction liquid (caustic soda 20g / L, insurance powder 25g / L), then steaming at 100-102℃ for 80-100 seconds to develop color, three-grid water washing, two-grid soap washing (soap washing temperature is 90-95℃), cold water washing, and drying.
[0073] 2. Re-rolling with reactive dye liquor, the reactive dye liquor includes reactive red M2B (Runtu) 10-50g / l, reactive orange WRE (Wold) 0-30g / l and anti-migration agent ST200A 5g / l, three sets of hot air drying (drying temperatures are 90-100°C, 120-140°C, 170°C respectively), rolling with reactive fixing liquid for steaming and color development (temperature 100-102°C, time 60-90 seconds), then three-grid cold water washing, two-grid hot water soap washing, two-grid cold water washing, and drying.
[0074] 3. Then dip and roll the post-finishing working solution, the post-finishing working solution consists of: color fixing agent MJ611, concentration of 0-30g / l, 140-150℃ stentering.
[0075] Table 5 Perspiration and light fastness data of conventional scarlet fabric dyeing process
[0076]
[0077] Conclusion: Compared with Comparative Example 3, the light fastness to sweat and perspiration in Example 1 is better than that of the conventional two-bath dyeing process. The light fastness to sweat and perspiration of the fabric by the conventional scarlet fabric dyeing process is 2 to 3 levels for acid sweat and 2 to 3 levels for alkali sweat after 120 hours of exposure, which cannot meet the 4-level requirement required by the market.
[0078] (6) Comparison between the bright red fabric on the market and the bright red fabric of this scheme
[0079] a. Choose the regular red fabric 1 on the market, which comes from Huzhou Lanxiang Special Fabric Co., Ltd., C50 / B10 / T40 32*32130*70 red TCX. The fabric contains 50% cotton, 10% fiber, and 40% polyester fiber. The specifications are 32*32 and 130*70.
[0080] The fabric obtained in Example 1 was tested and compared with the scarlet fabric of the same specification and color on the market. The test standards and test results are as follows:
[0081] Table 7.1 Performance comparison between the fabric obtained in Example 1 and the red fabric 1 on the market
[0082]
[0083] Conclusion: The bright red fabric 1 on the market and Example 1 are both colorless after being soaked in water at 90°C for 15 minutes. It can be seen that the bright red fabric on the market and the bright red fabric of this solution will not fade, the colors are relatively stable and the color values are not much different, so the change of the dye will not affect all the original properties.
[0084] After being exposed to the sun for 20 hours, the sweat light fastness of the bright red fabric on the market and the fabric in Example 1 are both above level 4, and it can be seen that the sweat light fastness of the fabric in Example 1 is higher than that of the bright red fabric on the market; after being exposed to the sun for 120 hours, the sweat light fastness of the bright red fabric on the market decreases, and finally reaches level 1 to 2 for acid sweat and level 2 for alkali sweat; while the bright red fabric prepared in Example 1 still remains above level 4, which is more in line with market needs.
[0085] b. Choose the regular bright red fabric 2 on the market, which comes from Huzhou Lanxiang Special Fabric Co., Ltd., C70 / N3032 / 2*32 / 2, 100*55 18-1664TCX bright red. The fabric contains 70% cotton and 30% nylon, with specifications of 32 / 2*32 / 2, 100*55.
[0086] The fabric obtained in Example 2 was tested and compared with the scarlet fabric of the same specification and color on the market. The test standards and test results are as follows:
[0087] Table 7.2 Performance comparison between the fabric obtained in Example 2 and the red fabric 2 on the market
[0088]
[0089] Conclusion: The bright red fabric 1 on the market and Example 1 are both colorless after being soaked in water at 90°C for 15 minutes. It can be seen that the bright red fabric on the market and the bright red fabric of this solution will not fade, the colors are relatively stable and the color values are not much different, so the change of the dye will not affect all the original properties.
[0090] After being exposed to the sun for 20 hours, the sweat light fastness of the bright red fabric on the market and the fabric in Example 1 are both above level 4, and it can be seen that the sweat light fastness of the fabric in Example 1 is higher than that of the bright red fabric on the market; after being exposed to the sun for 120 hours, the sweat light fastness of the bright red fabric on the market decreases, and finally reaches level 2 for acid sweat and level 2 to 3 for alkali sweat; while the bright red fabric prepared in Example 1 still remains above level 4, which is more in line with market needs.
[0091] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A method for improving the perspiration and light fastness of red fabrics, characterized in that: The long-wheel continuous pad dyeing technology is adopted, which includes the following steps: S1, firstly immerse the fabric into a dispersed and reduced mixed dye solution, wherein the dispersed and reduced mixed dye solution comprises sodium sulfate; then immerse the fabric into a reduced solution for color development, wherein the reduced solution comprises soda ash and sodium hydrosulfite; S2, then padding a reactive dye solution, wherein the reactive dye solution includes sodium sulfate, drying, and padding a reactive color fixing solution; S3, finally, the finished product is dipped in the finishing working liquid and stretched and dried.
2. The method for improving the perspiration light fastness of red fabric according to claim 1, characterized in that: The long-car continuous padding technology adopts a one-immersion-one-pad mode, with a car speed of 50-80 M / min and a padding rate of 40%-50%.
3. The method for improving the perspiration light fastness of red fabric according to claim 1, characterized in that: The process of step S1 is: firstly immersing and rolling disperse / reduced dye solution, drying with three sets of hot air drying fans, high temperature baking, cooling with cold water rollers, then immersing and rolling with reduced solution, steaming and coloring in a steamer, three-grid cold water washing, hydrogen peroxide oxidation, soap washing, water washing, and drying in a drying cylinder.
4. The method for improving the perspiration light fastness of red fabric according to claim 1, characterized in that: The dispersed and reduced mixed dye solution also includes reduced red FBB, reduced brilliant orange GR and anti-migration agent ST200A; wherein the concentration of reduced red FBB is 5-30 g / l, the concentration of reduced brilliant orange GR is 10-30 g / l, the concentration of sodium sulfate is 50 g / l, and the concentration of anti-migration agent ST200A is 5 g / l.
5. The method for improving the perspiration light fastness of red fabric according to claim 4, characterized in that: The disperse and reduce mixed dye solution also includes disperse red HL-2GLA and disperse yellow SE-4RL; wherein the concentration of disperse red HL-2GLA is 10-80 g / l, and the concentration of disperse yellow SE-4RL is 0-20 g / l.
6. The method for improving the perspiration light fastness of red fabric according to claim 1, characterized in that: The process of step S2 is: padding with reactive dye solution, three groups of hot air drying, padding with reactive color fixing solution, steaming color fixing in a steamer, hot water washing, soap washing, cold water washing, and drying.
7. The method for improving the perspiration light fastness of red fabric according to claim 1, characterized in that: The reactive dye solution also includes reactive red M2B and anti-migration agent ST200A, wherein the concentration of reactive red M2B is 5-20 g / l, the concentration of glauber salt is 40-50 g / l, and the concentration of anti-migration agent ST200A is 5 g / l.
8. The method for improving the perspiration light fastness of red fabric according to claim 1, characterized in that: The active color fixing solution comprises 200 g / l of industrial NaCl, 20 g / l of soda ash, 5 g / l of caustic soda and 5 g / l of resist salt.
9. The method for improving the perspiration light fastness of red fabric according to claim 1, characterized in that: The post-finishing working solution comprises 20-40 g / l of an anti-ultraviolet finishing agent CTA-760A and 20-30 g / l of a color fixing agent MJ611.
10. The method for improving the perspiration light fastness of red fabric according to claim 1, characterized in that: The tentering and drying temperature in step S3 is 140-150°C.