Requirements for the quality of varnish on paper printed materials
Time:2025-12-30
Views:34
Before surface treatment and polishing process, high-quality water-based varnish should be selected based on the printed material to achieve the best polishing effect. At the same time, the daily application and construction process of the printed material should be considered when selecting water-based varnish products. When choosing water-based varnish for paper printing, the following aspects should be noted:
1、 Good leveling property:
Due to the different materials used in packaging products, there are inevitably differences in the structure of printed graphics and text. This requires good leveling of the varnish, which can quickly form a uniform, smooth, and bright film layer on the surface of the printed product after coating, in order to achieve better protection and decoration of the product.
2、 Fast curing and drying speed of varnish:
Light oil is suitable for surface coating on various types of paper such as cardboard boxes, color boxes, etc. After coating on the surface of printed materials, the light oil is quickly cured and dried by heating in a drying oven to ensure that the light coating on printed materials does not have a sticking phenomenon.
3、 The varnish surface facial mask layer must have good toughness:
For example, the flexibility of varnish film on the surface of paper printed products such as cartons/cartons/is not good, and the surface facial mask layer is prone to embrittlement during folding, affecting the decorative quality of products. The varnish must also have good toughness to meet the process requirements of post press processing for packaging products.
4、 High wear resistance:
The post printing processing of color boxes, color boxes, and paper products is generally completed by machinery, and friction is inevitable in the mechanized production process. In addition, factory products are inevitably subject to friction during the customer‘s automatic packaging, handling, and transportation processes. If the varnish film layer is not wear-resistant, the printed matter is prone to color fading, causing certain economic losses. Using wear-resistant varnish can effectively solve the problem of color fading in printed matter.
5、 The varnish should have high transparency and resistance to yellowing:
To achieve high-quality gloss effect on printed materials, it is required that the dried film layer not only presents the luster of the original printing ink color, but also forms a highly transparent film layer on the surface of the printed material. Therefore, high transparency and stable performance of the gloss oil are required; Only then can the packaging printed materials withstand sunlight or long-term use without any adverse phenomena such as discoloration or yellowing.
6、 Good adaptability of varnish:
Color box products on the market, such as electronics, cosmetics, clothing, cigarettes, food and other packaging, require printed materials to have moisture-proof, anti mold, anti fouling, acid and alkali resistant, heat-resistant and solvent resistant properties after being glazed; The chemical resistance of the dried varnish film layer is stable and does not easily change when it comes into contact with weak acids or bases in the environment.
Shenzhen Gold Sun Color Printing Factory is a China based book manufacturer, very good at printing hardcover book, photo book, story book, photo album, Printing paper, coloring book, packaging & printing services, Labels, printing stickers, anti-water labels, vinyl label, custom label book , softcover book, custom book printing hardcover, mini book, photobook printing, hardcover book, , board books, color sticker books, sticker books, packaging boxes for small business, custom book, children board books, kids book, journals, notebooks, Agenda, Customs Calendar, magazines, color books, cookbooks, etc. With ISO-2001 and CE certificate, Gold Sun offers very good price and outstanding service.
Welcome contact us through admin@goldsunprinting.com or add whatsapp +86 13802583954. Thank you.
Email
008613802583954
whatsapp