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 the fabric dyed with ground color, so that the printed pattern becomes white, which is called discharge white; it makes the printed pattern appear lighter. The 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 transfer the dye in the pattern to the textile through processing during transfer printing, and fix it to form 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 printing paper with disperse dye patterns printed on it, and transferring the printed pattern to the fabric under a certain temperature and pressure. process, especially suitable for polyester fabrics.
Cold transfer printing refers to transferring the printing paper printed with the reactive dye pattern to a pad that has been padded with alkali solution under a certain pressure. Printing process on cotton cloth and then cold stack to solidify the color.
Because cold transfer printing technology can directly use transfer printing paper at room temperature, popular elements can be transferred through a high-precision cold transfer printing machine On denim fabrics, you can 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, more energy-saving and environmentally friendly, so it is favored by consumers and the industry. people pay attention.
However, most denim fabric manufacturers do not have cold transfer printing equipment, and the required transfer paper plate making is expensive and the transfer paper is difficult to recycle after use. , so this makes the production cost of the fabric higher. 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.
