Gilding press to print production although is a very big development, but the quality of the products is not in production can guarantee good, so in order to ensure the quality of tipping machine after printing, still need to take some necessary measures, bronzing eligibility of hot stamping machine is the foundation of the hot stamping quality. It refers to the type selection and electrochemical aluminum bronzing matching between speed, temperature, pressure and other factors. In the case of fixed equipment and other hardware, it is the most important means to improve the quality of bronzing.
1. Reverse pull reverse pull refers to the hot stamping after anodized printing ink or printing ink on the varnishes, etc. This is mainly because the surface of printing ink is not dry or printing surface UV after processing, resulting in printing ink, UV oil and paper surface bonding is not firm. Solution: wait for printing dry and then bronzing. In addition, anodized aluminum with low separation force and good heat transfer property can be used.
2. Paste version and hot stamping after anodized color paste plate mainly due to bronzing plate production, anodized installed slack or anodized foil is not correct. Hot stamping after anodized color is mainly caused by hot stamping temperature. In addition, anodized aluminum wrinkle is also easy to cause hot stamping and folding color uneven and discoloration, can be solved by appropriately reducing the temperature. For the round flattening machine can be added to the foil fan, keep the foil flaring, avoid hot stamping before the anodized version and scorch.
3. Improper process arrangement, damaged the anodized surface gloss, text and text outline. Need laminating processing bronzing, people often worry about gold foil easy to wipe off and hot stamping and laminating, which is easy to:
A. thin film (especially matt film) will damage the surface gloss of anodized aluminum, and it is not suitable to use water-soluble glue to cover the film, otherwise it will cause the anodized surface to turn black, and at the same time, it is easy to cause the gold powder to stick on the edge of the text and text to cause the virtual phenomenon.
B. After gilding, it is dented by pressure. In addition, glue is not easy to penetrate into the surface layer of anodized aluminum, which is easy to cause the separation of OPP and paper in the gilding area, thus affecting product quality. The correct process is to be covered with film and then bronzing, OPP matching anodized.
4. Hot stamping or hot stamping is not true and the surface characteristics of the printing, anodized properties, hot stamping temperature and pressure and other factors.
Printing surface dusting too much or surface containing adhesive, gloss paste and other additives, which will hinder the anodized and paper adsorption. Solution: the surface powder treatment or in the printing process. The improper selection of anodized aluminum directly affects the fastness to gold stamping. Should be based on the size of the bronzing area, the characteristics of hot stamping materials to consider which model of anodized aluminum. Not correctly grasp the gold stamping equipment and stamping time and stamping temperature between the match, affect stamping fastness and graphic outline clarity. As a result of equipment, hot stamping materials are different, hot stamping time, hot stamping temperature are not the same. Of course, hot stamping time, hot stamping temperature and production efficiency are greatly affected by the transfer performance of anodized aluminum.
In short, there are many factors that affect the quality of bronzing machine, making high quality bronzing version, the correct grasp of bronzing fitness is the key to improve the quality of bronzing.