The mesh size of the printing screen is 1.5 mesh in international standard units of 1T 2.5 mesh is equal to 2.5 mesh holes per square inch.
The mesh size indicates the density of the wire mesh. The higher the mesh size, the denser the wire mesh, and the smaller the mesh size. The selection of screen mesh size can be based on the accuracy requirements of the printed product, and different screen mesh sizes can be chosen. The criteria for selecting the number of lines are as follows: when there is a high demand for ink volume, 70-200 lines/in should be used; for general printing, 200-300 lines/in should be used; and for fine graphics and text, 300 lines/in or above should be used.
Extended Information
Plate making method
Direct plate making method
Method: The direct plate making method is to first place the photosensitive film surface of the wrist film base coated with photosensitive material flat on the workbench, and then place the stretched wrist mesh frame flat on the film base. Then, place the photosensitive paste in the mesh frame and apply pressure with a soft scraper. After drying thoroughly, remove the plastic film base, attach the photosensitive film wrist mesh, and it can be used for plate making. After development and drying, the silk screen is produced.
Process flow: Stretching the mesh - degreasing - drying - peeling off the substrate - exposure - developing - drying - repairing - sealing the mesh
Indirect plate making method
Method: The method of indirect plate making is to first expose the indirect film, harden it with 1.2% H2O2, develop it with warm water, and dry it to make a peelable graphic film. During plate making, the adhesive film surface of the graphic film is tightly attached to the stretched screen, and the adhesive film is pressed tightly to the wet screen. The film base is removed, and the screen printing screen is made by blowing it dry with wind.
technological process:
1. Web stretched - degreased - dried
2. Indirect film - exposure - hardening - development - bonding - drying - repairing - sealing
3. Direct mixed plate making method
First, paste the photosensitive adhesive layer with water, alcohol, or photosensitive adhesive onto the screen frame, dry it with hot air, remove the base of the photosensitive film, and then print the plate. After development treatment, the screen plate is made.