Glossary: ​​Printing inks

The transparency of the UV ink determines its absolute superiority in copying the dots, which in turn makes printing that was originally more suitable for overprinting more advanced than screen printing.

Like pad printing and silk screen printing, the substrate materials involved are numerous. We often use two-component inks for printing on glass, ceramics, and metals. The following points must be considered when using two-component inks: one is The proportion of hardener and ink must be correct, the second is to deploy the average, and third, pay attention to the drying temperature, in general, the drying temperature is lower than the thermal deformation temperature of the printing material, some PP plastic temperature is lower, the metal Ceramic and glass temperatures are higher. The products involved in pad printing are known for its small size, making its printing cost low, and it is expected that the development of the line-type pad printing machine will gain a vast market space. The printing ink layer is thinner. In order to achieve a more ideal color saturation, the finer the fineness of the pigment and the higher purity of the resin, these are the difficulties of the UV pad printing ink.

There is no essential difference between pad printing inks and screen printing inks. In principle, it can be used universally. The printing inks produced by most ink manufacturers are actually screen printing inks, especially solvent inks, because of the viscosity of solvent inks themselves. Higher, used in pad printing machines can basically meet the transfer requirements of the printing process.

Whether UV inks are still solvent inks, to ensure consistent print quality, special instruments are needed to detect and standardize some indicators, such as viscosity, surface tension, solvent volatilization rate of solvent inks, UV curing parameters. And so on, investing in testing instruments can increase your company's ability to withstand market competition. There are two reasons for this. One is that special UV pad printing inks cannot be replaced by solvent-based UV screen inks. The UV inks themselves have poor thixotropy and poor plasticity. During printing ink sticks and deinking , Traditional UV inks show great inertia, the surface dry phenomenon is difficult to reach the scale of solvent-based inks, the other is that UV inks are usually made of photosensitive acrylic resin, and the adhesion of acrylic resin on the surface of the print head is not In order to transfer problems, the situation has now been solved. Hangzhou Kewang Ink Co., Ltd. has taken the lead in researching UV printing inks at home and succeeded. German MARABU and French DUBUIT companies are also familiar with UV. The huge market for printing inks is being developed. It is expected that in the near future, there will be a surge of UV inks in the field of pad printing. Of course, there are a lot of SR and PY series of screen printing inks on the market, although it can also be used in the printing process, but there will be a variety of problems, you need to add ST1 fillers and thinners to make up, give Printing adds unnecessary trouble.

The printing process and offset printing process are still very different. First, the properties of offset printing ink and pad printing ink are different. Different printing plates are used. The control of offset printing technology is more complicated than that of pad printing technology. The printing professional staff researches in the field of offset printing. Far more than pad printing, workers engaged in pad printing technology really learn very little about printing technology. The use of pad printing inks and screen printing inks is to increase the predecessors' trials and provide a standard basis for formal production. It is on this basis that improvements made to screen printing inks have become special printing inks. Now MARABU has introduced six special solvent-based printing inks to the market: GL, TPR, TPU, TPY, TPY, and TPP. It has been completely suitable for printing and printing of various printing materials. When we use pad printing to complete printing It may be preferable to use the above ink. The pad printing inks of APPOLO of the United Kingdom and COATES of the United Kingdom are now replaced with screen printing inks. After the ink sticks to the printing rubber head, it will appear dry, plasticity increases, and the activity will be weakened. This can avoid the phenomenon of irregularities in the graphic, when the ink is transferred from the printing pad to the substrate. Requires that the printing ink has a good cohesion to prevent the ink from deinking.

To date, there has been no manufacturer of pad printing machines to develop printing and UV curing integrated production line type pad printers for this progress. It is very important that printing is more as a link in the manufacturing industry. She has never been treated as an independent printing technology like offset printing. Why not use pad printing ink? MARABU once again demonstrated its professionalism and meticulousness in controlling the volatilization rate of solvent-based ink. It is equipped with a series of oil-water from slow-drying to quick-drying for easy use. Workers are deployed as needed. In fact, the higher color concentration of solvent-based printing inks than screen-printing inks is a feature that we can easily discover when we review MARABU printing inks.

However, if you carefully examine the printing process and the screen printing process, we will find that the most important characteristics of pad printing inks are fast drying and good thixotropy. So far, professional production of printing ink is not quite a few, more well-known German MARABU ink, practice has proved that the use of special printing ink to obtain the printing effect is much better than the use of screen printing ink. With the increasingly strong social requirements for environmental protection, the use of UV inks has become more and more common. In the field of offset printing, gravure printing, flexographic printing, resin printing, and screen printing, the use of UV inks has reached a very mature level. , but it has only just begun in the pad printing process. Using UV printing ink we can get benefits in terms of drying. When we print small text, we don't need to worry about the ink drying on the steel plate. So we prefer to use UV ink in terms of printing fine lines. In addition, the transferred ink layer is much thinner than the screen printing. The color density of the pad ink is higher than that of the screen printing ink.

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