The problem of printing coating glazing process

The color printing paper plastic film makes the surface of the printed product clean and smooth like a mirror. The color printing pattern is more colorful, dazzling, and plays a role in protecting the ink. It can enhance the entire printing paper or packaging, and can also be used for packaging and packaging. The packaging plays a role in waterproofing and dampproofing, especially for books, journals, or transcripts, which can increase the number of times the cover can resist folding.

However, the disadvantages of the paper and plastic film coating process are that the plastic film in the printing and packaging product is not easy to be removed and is not easily degraded. Therefore, more and more people in the industry believe that the surface should be coated with varnish. Replace paper plastic film. In fact, the use of the surface coating process is earlier than the use of paper plastic film, but the previous coating is mainly carried out in the paper mill before printing, and now the paper coating and polishing before printing is used in large quantities. With the increasing use of waterborne polymer finishing agents, the quality of paper is getting better and better. The gloss of many high-grade coated papers is already very good. After printing, they are no longer glazing or laminating, and they can meet the requirements of many products. .

However, for the printing glazing process, the application amount is still very small. Although it has the advantage of facilitating paper recycling, the disadvantages are also obvious. The first is the enhancement of the product on the light and the number of folding times can not be compared with the paper plastic film products; Second, the protective effect of coating products on the printing ink color, moisture and waterproof effect is not and film products; again, the current coating The quality and price ratio of oil products is still unsatisfactory. The gloss of water-based coating oil is obviously insufficient. Organic solvent-based coating oil is polluting the environment. UV coating oil not only has an alarming price, but also has different degrees of environmental pollution.

However, in general, the fundamental reason for the lack of strength of Varnishes in the color printing and packaging industry is caused by its insurmountable disadvantages compared with those of paper and plastic coated products. In spite of this, many insiders still think that Varnish is a product with great vitality and great market potential. Its larger market is not in the fields of books and magazines, notebook cover printing, but in the packaging and printing of other commodities. Because the outer packaging of many products is not like books and notebook covers, it needs to be folded repeatedly, especially for middle and low-end products of different grades. The market for water-based varnishes is still relatively large. However, improving the quality of products and reducing the price of products so that varnish oil does not contain volatile organic poisons are the three major problems that must be overcome first.