[Review]: Plexiglass screen printing: the best choice for low cost and high return
ã€Extended】 ： Introduction of DBL glass screen printing ink
[Extended]: Analysis of the photo-engraving process of plexiglass screen printing
ã€Extended】 ： Seven points of improvement of plexiglass screen printing process
ã€Extended】 ： Analysis of the main points of plexiglass screen printing ink
Mastering high-quality plexiglass (acrylic) screen printing technology is the core goal of plexiglass (acrylic) processing plants. The main points for improving the plexiglass (acrylic) screen printing process are as follows:
1. Put the negative film on the glass plate, and then expose it. Put the stretched screen on the negative film and parallel to the image axis. If moire appears, rotate the screen to the left or right until the moire disappears, usually by 7 °. The area where moire is easy to form is located in the direction of the wire mesh and at the intersection of the wire mesh. The main color and the darker color cause more problems with moire.
2. A basic requirement for perfect image reproduction is that the quality of the transparent positive film is better, that is, the edges of the dots should be neat and opaque. The color separation film and the printing ink used use the same color scale.
3. The ground squeegee blade is essential for high-quality printing. The Shore hardness of the blade is about 70. The squeegee should be set at an angle of 75 °. If the angle of the squeegee is adjusted too flat, the printed image may be blurred. If the angle is adjusted too steep, the risk of screen printing image distortion is greater.
4. For four-color printing, the same size and stable aluminum screen frame should be used, and the screen frames used are all stretched with the same type and type of screen. The use of dyed silk screen helps to eliminate moire. The tension of the screen should be uniform and the tension of the four screen printed four screens should be the same.
5. The mesh tone image is printed with high viscosity ink, the finer screen needs the denser color ink.
6. The ink return knife should not be installed too low. If so, the membrane plate will be filled with excessive ink, and the printed matter is easy to blur and rub.
7. When using UV ink, the tone range of the mesh tone image should be selected from 5% to 80%, and the Shore hardness of the rubber scraper should be 75. In order to control the UV ink from overprinting in color, it is recommended to print in the order of cyan, magenta, yellow, and black. When using UV ink, the screen thickness should not exceed 5um.
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