I found a lot of The printing masters believe that fluorescent inks with higher pigment content often have problems of ink accumulation, emulsification, and two to three times of printing to barely achieve the desired hue and fluorescence. In fact, high-quality fluorescent inks can be close to the general four-color inks in terms of printing performance. The main reason for the above misunderstandings is that the supply of high-quality fluorescent inks in the market is relatively small and the selling price is relatively high, which makes the printing enterprise buyers usually choose lower. Price product.
1. Hue and fluorescence standards of fluorescent inks
Generally, domestic and foreign ink factories use imported fluorescent inks as raw materials. The hue and fluorescence standards are generally based on the PMS 801-807 number on the Pantone. Therefore, the fluorescent ink used in the production of fluorescent inks can be consistent with the requirements of the "PANTONE" book under both standard and UV light sources, both in hue and in fluorescence. At the same time, all ink factories that use the "PANTONE" number must send their inks to the United States' Pantone Company. After passing the certification of Pantone, they can be sold under the name and number of "Pantong". In addition, most designers and print buyers also use the standards represented by the numbers in the “PANTONE†book to design or serve as the receiving standard. Therefore, the purchase of non-standard fluorescent ink not only affects its printing performance, but also loses orders because it cannot meet the hue and fluorescence required by the printing buyer.
2. Consequences of insufficient fluorescent ink concentration
High-quality fluorescent inks can reach the standard when the fluorescent ink content is 65% to 75%, so the price is high. When using a fluorescent ink with a low price and a low fluorescent ink content, it takes two to three times to be able to barely meet the standard, which is time consuming.
3. Common problems and causes of low-cost fluorescent ink printing
Because the high-quality fluorescent ink is made of imported high-quality fluorescent ink, it is different from the general four-color ink in the ink-making formula and the selected binder/auxiliary. Otherwise, it is difficult to make the fluorescent ink maintain its proper concentration. Has good printing performance. Compared with the low-cost and low-cost fluorescent ink, in addition to the price, the pigment content is reduced, and because the special binder/auxiliary is not used, even if the content of the fluorescent ink is increased, the concentration is higher. There is no way to avoid the following when printing.
(1) After printing 300 to 500 sheets, there is a case where ink is accumulated and excessive emulsification occurs due to a decrease in water resistance of the ink.
(2) Since the ink is difficult to disperse, the ink cannot be uniformly transferred to the substrate at the time of printing.
(3) It is easy to have flying ink, and printing cannot be completed at a higher speed.
The above content is selected from the first issue of the “Printing of Digital Printing†by Keyin Media in 2016. For more journal content, please pay attention to the journal channel.
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