The difference between the most popular pad printi

2022-10-18
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The difference between pad printing ink and screen printing ink

different processes have different requirements for ink, and appropriate supplementary components must be added to the ink to make it easier to use in specific occasions, such as offset printing ink with high viscosity and good water resistance; Gravure ink is thin and has good fluidity; Silk ink must have good permeability

generally speaking, the main difference between the inks used in different processes is the different additives contained in the inks. This article will mainly talk about silk inks and pad printing inks

in terms of the suitability of the substrate, silk printing has great advantages, especially in the non stereotyped plastic, hardware, electronics and direct consumer goods industries, silk printing has been widely praised. However, there is no universal printing method in the world, and silk printing is no exception. In the field of industrial printing with small area and irregular substrate surface, silk printing encountered real trouble, which led to the birth of pad printing technology. It can be said that although pad printing technology and silk printing are very different, their industrial fields are very similar

the earliest pad printing ink was replaced by silk screen printing ink, and practice has proved that there is nothing absolutely unsuitable. However, when the ink is used in different printing environments, there must be different adaptability. For example, for pad printing ink, users do not require it to have the permeability of silk screen printing ink at all, but Wang Xia said that it is required to have better thixotropy and surface dryness to ensure that the transmission process from steel plate to rubber head and substrate is more accurate. Using special pad printing ink will undoubtedly make it easier to improve the printing quality

marabu took the lead in developing special pad printing ink. The surface tension of the ink is kept in a constant range through the action of the force adding agent, so that the transfer of vanadium containing scum ink produced by the printing process, including smelting, is absolutely consistent

the process of ink transfer is also closely related to the properties of the pad printing head. Controlling the surface tension of the pad printing head within a range similar to that of the pad printing ink seems to be a systematic project, and the essential purpose is to improve the ink transfer efficiency. The Japanese solve this problem from another perspective. They install a glue head cleaning device on the pad printing machine. However, the installation of a glue head cleaning device is mainly to control the transfer amount of ink, and the transfer efficiency has not been improved

marabu has 6 kinds of pad printing inks to choose from (actually, there are 8 kinds of them). GL is mainly used on the surface of metal, ceramics and glass. It is basically a two-component ink, which needs to be added GLH and hardened. TPR is a pad printing ink improved on the basis of SR series silk printing inks. All materials that can be used by SR can make TPR in the pad printing process; Similarly, TPY is a pad printing ink improved on the basis of Py series silk printing ink; TPU ink can be used on the surface of materials that are very difficult to print; TPT is a pad printing ink mainly used in oil cup pad printing machine; TPL has better stability and can maintain good uniformity under long-term friction. The other two are TPP and TPS

it is worth noting that silk screen printing ink and pad printing ink are completely universal, but additives need to be added to change the printability. Therefore, when there is no special pad printing ink, silk screen printing ink can be used instead

source: advertising products

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