The quality of the screen printing, the thickness of the ink layer are closely related to the thickness of the screen, the viscosity of the ink, the hardness of the squeegee, the angle, and the method of plate making.
1. Silk plate and positioning: aluminum plate material uses three-point edge positioning. In color printing, light color is printed first, then dark color.
2. The distance between the printing plate and the substrate is 1-2 mm, and the distance is related to the selection of the screen. The nylon screen has good elasticity and high flexibility, generally 2-3 mm.
3. Polyurethane rubber sheet for squeegee, its hardness is 70-75 degrees, thickness is 8-9 mm, the proper squeegee angle is 70 degrees when printing, and the squeegee speed should move in a straight line at a uniform speed.
4. Adhesive protective film: After printing, in order to avoid trauma during cutting and transportation, a transparent pressure-sensitive adhesive protective film should be pasted on the surface and double-sided adhesive tape on the back.
5. Cutting: With a small shearing machine, forming can be punched by hole positioning or edge positioning. Engraving signs: generally refers to the use of a rotary saw or a vertical saw to engrave text or patterns from rubber or copper or other plates. In the mid-1980s, the rubber sheet with acrylic sheet (acrylic) was a typical material at that time. But now it has developed into metal plates, copper plates, aluminum plates and other materials. In order to show the three-dimensional effect of small characters, it has been applied to acrylic (acrylic) materials. Although the engraved sign does not have the point of body lighting or font lighting, it can express the text content by itself.