In the field of clothing printing, DTF (Direct to Film) technology is gradually becoming a popular choice in the market with its high precision, high efficiency and environmental protection characteristics.
However, some users in the use of DTF printing technology, found that the printing after washing discoloration phenomenon, which not only affects the beauty of the product, but also reduces customer satisfaction. This article will delve into the reasons for the discoloration of DTF printing after washing, and propose effective solutions to help users better cope with this problem.
1. Analysis of reasons for discoloration of DTF printing after washing
The discoloration of DTF printing after washing is a complicated problem, which involves many links and factors. The following are the main causes of discoloration:
(1) The characteristics of the fabric itself
The characteristics of the fabric itself are also an important factor leading to the discoloration of DTF printing after washing. Different fabrics have different ability to absorb and fix dyes, which affects the color stability and durability of printing.
Dye quality decline: there are fewer real cotton fabrics on the market, and more silk cotton, chemical fiber and other fabrics. The quality of the dyes in these fabrics may not be as good as cotton fabrics, resulting in discoloration problems after printing.
Fabric sublimation phenomenon: Some fabrics will appear after printing sublimation phenomenon, that is, the dye in the fabric will sublimate to the light-colored parts of the pattern under high temperature or long-term light, polluting the printing part, resulting in discoloration.
(2) Problems in the printing and pressing process
DTF printing technology involves two key steps: printing and pressing. Improper operation in these two steps may also cause discoloration of the print.
Print quality problems: If the printer’s nozzle is blocked, the ink is uneven or the printing parameters are set improperly, the printed pattern will be uneven or fuzzy, which will affect the color stability of the printing.
Improper control of pressing temperature and pressure: Pressing is one of the key steps in DTF printing technology. If the pressing temperature or pressure is not properly controlled, it will lead to the combination between the printing pattern and the fabric is not strong, thus affecting the robustness and color stability of the printing.
(3) Improper washing and maintenance methods
Washing and maintenance methods are also important factors affecting the color stability of DTF printing. If the washing method is not proper or the maintenance method is not correct, it will cause the printing to discolor or fall off.
Use inappropriate detergents: Chemicals in some detergents may react with the print, causing it to discolor.
Washing temperature is too high or time is too long: High temperature or long time washing will accelerate the loss and sublimation of the dye in the fabric, resulting in printing discoloration.
Improper drying method: long-term direct sunlight or high temperature drying may also cause printing discoloration.
2. DTF printing color change solution after washing
For the above reasons, we can take the following measures to solve the problem of discoloration after DTF printing:
(1) Improve the selection and handling standards of fabrics
Choose high-quality fabrics: When purchasing fabrics, choose fabrics with good quality and high dye quality. Avoid using poor-quality fabrics to reduce the risk of printing discoloration.
Fabric pre-treatment: Before printing, the fabric is pre-treated, such as dyeing and color fixing treatment, anti-sublimation treatment, etc., to improve the color stability and durability of the fabric.
(2) Optimize the printing and pressing process
Improve print quality: Maintain and maintain the printer regularly to ensure that the nozzle is smooth and the ink is even. At the same time, according to the fabric type and pattern requirements, adjust the printing parameters of the printer to obtain the best printing effect.
Precise control of pressing temperature and pressure: Through experiments and tests, find the best pressing temperature and pressure for fabrics and printing glue. During the pressing process, the range of temperature and pressure changes should be strictly controlled to ensure that the combination between the printing glue and the fabric is firm and the color is stable.
(3) Improve washing and maintenance methods
Use the right detergent: Choose a detergent that is harmless to printing. Avoid using detergents that contain bleach or strong alkalines to reduce damage to the print.
Control the washing temperature and time: when washing, it is necessary to control the washing temperature and time to avoid the loss and sublimation of dyes in the fabric caused by high temperature or long time washing. At the same time, avoid using the strong mixing function in the washing machine to reduce friction and damage to the printing.
The correct way of drying: When drying, avoid long-term direct sunlight or high temperature drying. You can choose a cool and ventilated place to dry to reduce damage to the print.
(4) Strengthen quality control and testing
Establish a quality control system: In the DTF printing production process, it is necessary to establish a perfect quality control system. Strict quality control should be carried out in all aspects from fabric procurement, printing, pressing to washing and maintenance to ensure that product quality meets customer requirements.
Strengthen the quality inspection: before the printing product leaves the factory, strict quality inspection should be carried out. The color stability, firmness and durability of printed products are evaluated by visual inspection, color fastness test and friction test. For unqualified finished products, they should be reworked or scrapped in time.
(5) Improve the skill level of employees
Strengthen staff training: Conduct regular training on DTF printing technology and quality control for staff. Improve employees’ understanding and mastery of DTF printing technology, and enhance their awareness and attention to product quality.
Encourage employees to innovate: Encourage employees to innovate and improve DTF printing technology. Through technological innovation and process improvement, the quality and competitiveness of DTF printing products are continuously improved.
3. Conclusion
The discoloration of DTF printing after washing is a complicated problem, which involves many links and factors. By improving the selection and handling standards of fabrics, optimizing printing and pressing processes, improving washing and maintenance methods, strengthening quality control and testing, and improving the skill level of employees, we can effectively solve the problem of discoloration after DTF printing. The implementation of these measures can not only improve the quality and competitiveness of DTF printing products, but also provide customers with more satisfactory products and services.
In the future development, we will continue to pay attention to the development of DTF printing technology and market changes, and constantly optimize and improve our products and services. At the same time, we also look forward to working with our customers to jointly promote the innovation and development of DTF printing technology, and inject new vitality and momentum into the clothing printing industry.
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