Marble ink production process

UV Braille Crystal Clear (Colorful) Varnish Short UV Braille oil, also known as marble ink. It is mainly composed of highly concentrated, highly transparent, high-expansion UV-cured oil that does not turn yellow after curing. The main advantages are fast drying, wear-resisting, environmental protection, crystal clear, non-yellowing, and smooth feel. After the screen printing process, the printed part has a three-dimensional effect regardless of visual and feel, and the thickness can reach 2mm. After drying, the printed area resembles a solid crystal. If mixed with colorful powder and magic color film, the effect is like a colorful gem. It can be used to embellish clothes, flowers, bird's wings, leaves, lines, comics and other patterns. It has been widely used in packaging, calendars, greeting cards, books, business cards, and other papers in developed coastal printing areas, including dumb film substrates. UV drying conditions are above 80 W/cm. 

Its production process mainly pays attention to the following points:

1. Choose a good UV Braille crystal varnish. Must choose high transparency, high concentration, no blistering after printing, Braille varnish that does not turn yellow after curing. Adhesion is also better. 

2. Screen production. First, the screen tension should be between 20 and 21N. The number of mesh yarns is suitable for between 25 mesh and 150 mesh. If you want to mix colorful powder printing, you should choose between 25 mesh and 80 mesh mesh (mainly consider whether the color powder can pass through the mesh and the size of the fixed number of meshes). The higher the height requirement of UV Braille, the smaller the mesh size, and the greater the mesh size. Also, thicken the thickness of the photosensitive adhesive, operating procedures; coated photosensitive adhesive - drying - coated photosensitive adhesive - drying - printing. 

3. Printing operation. The hardness of the scraper is 75-80. Sharp corners remain sharp. Scraper angle is selected at 45°. Printing pressure cannot be too great. It is only necessary to shave the convex ink on the screen. Because the pressure is considered to be slightly smaller than the normal screen printing, the distance between the screen and the ink should just be printed on the substrate. If the net distance is too large and the pressure of the squeegee is too high, it is easy to press the ink printed on the substrate back onto the screen plate. In this way, the ink thickness and surface smoothness effect of the printed ink are poor. 