With the continuous development of printing and dyeing technology, the style of denim fabrics continues to change. Printed denim fabrics are widely favored by consumers for their three-dimensional and realistic style. In terms of printing processing technology, the current denim industry mainly involves discharge printing and transfer printing.
Discharge printing is to print a discharge agent on fabrics dyed with ground colors to make the printed pattern white, which is called discharge white; to make the printed pattern appear brighter Light ground color is called half-drawing; making other colors appear in the printed pattern is called color-drawing. Discharge printing can print brightly colored and complex patterns on large-area ground-colored printed fabrics, and the pattern outlines are clear and full of three-dimensionality.
Transfer printing is to first print the dye on the transfer printing paper, and then during the transfer printing The dye in the pattern is transferred to the textile through processing and fixed to form the pattern. Transfer printing can be divided into heat transfer printing and cold transfer printing according to its different transfer methods. Thermal transfer printing refers to a printing process in which printing paper printed with disperse dye patterns is transferred to fabrics under a certain temperature and pressure. It is especially suitable for polyester fabrics. Cold transfer printing refers to a printing process in which printing paper printed with reactive dye patterns is transferred to cotton cloth padded with alkali solution under a certain pressure, and then cold stacked to solidify the color.
Because cold transfer printing technology can use transfer printing paper directly at room temperature, through high precision The cold transfer printing machine transfers popular elements to denim fabrics to achieve brightly colored, distinct layers and exquisite patterns. At the same time, cold transfer printing uses cold stack to fix the color in the color fixing process, which makes the process shorter and more energy-saving and environmentally friendly, so it has attracted much attention from consumers and industry insiders.
However, because most denim fabric manufacturers do not have cold transfer printing equipment, and they need Transfer paper is expensive to make and difficult to recycle after use, which makes fabric production more expensive. In addition, the tissue structure of denim fabrics is rich and changeable, and the fiber raw materials and tissue designs of many fabrics are not suitable for cold transfer printing technology, which also restricts the application of this technology in denim production. </p
