In recent years, the cold foiling process has gradually become a new item of concern for suppliers with its good comprehensive performance and convenient in-line processing capabilities, and has made great progress. Hot stamping requires two printing units. The first unit transfers the exclusive viscous ink to the offset plate base and attaches it firmly to it; the second unit transfers the graphic information to the viscous coating Cloth on the photosensitive layer. Some of the information may not be transferred in place, which is caused by scratches on the adhesive layer.
Manroland equipment is equipped with two positioning towers at key locations, which allows two adjacent printing units to flexibly adjust the positioning. According to the principle of mechanics, the positioning system can make the printing pressure more evenly distributed without causing imbalance in printing pressure.
The research and development of cold stamping process has enriched the performance of printing and added new design schemes, which can beautify the font and handle the level of detail in a more perfect way. Due to the plate-making process of relief printing, many details cannot be properly copied to the printing plate, resulting in low printing accuracy. Compared with the online integration operation of the online cold stamping process, offline hot stamping has relatively low cost but low accuracy.
The biggest advantage of on-line cold stamping over thermal transfer printing is its more accurate overprint accuracy. Unlike the thermal transfer, the transfer device in the cold foil process is installed on the coated photosensitive layer of the bottom layer, which can ensure that the information is printed directly after the information is transferred without causing too many problems.
The research and development of on-line cold stamping technology and its exclusive overprinting process have brought new performance effects and enriched the content of pre-press design. At the same time, this process has higher profits and lower storage costs than traditional thermal transfer, and it is an inline operation. This is the future development trend of industry. The inline cold stamping process will become a very strong market competitiveness. In the thermal transfer process, the transfer system is usually composed of the carrier material transfer layer, in actual printing will generally be divided into two layers. This situation is very different from the on-line cold stamping process. After overprinting, almost all the color adjustments have been completed, so that the ink can be properly transferred to the coated photosensitive layer without delamination, which affects the printing quality.
In the cold ironing process, the color is no longer predetermined, but the complete printed image is transferred to the coated photosensitive layer. This transfer method is completely different from the thermal transfer process, which is difficult to ensure registration accuracy due to the requirements of the process, and the phenomenon of ink delamination often occurs. Therefore, in the cold stamping process that was developed later, special attention was paid to the registration process. The intervention of coating the photosensitive layer achieved relatively accurate registration, which was suitable for traditional ink, UV ink and mixed ink.
Three-dimensional effect
In terms of visual communication, the cold ironing process has made new contributions, and the three-dimensional rendering effect cannot be achieved by traditional thermal transfer. Manroland is currently working on the development of a stamping technology in the cold stamping process, which will provide rich details such as stamping, cold sealing, and transfer. Although this research and development process is still in the development stage, it has shown great potential, the conditions will gradually improve, and the printing quality and process will become more and more mature.
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