1 Wide adaptability: the screen printing format can be large or small, the product material is basically unlimited, and the plane can be printed; 2 thick ink: among all printing processes, the screen printing ink layer is the thickest, the saturation is high, and the spot color printing effect is better; 3 Low cost: Screen printing is easy to make, the printing process is simple, and the printing cost is low; 4. The printing quality is stable, and the product is not damaged; 5 High production efficiency: The screen printing speed is fast, especially the Flat Screen Printing Machine greatly saves labor costs and improves production Efficiency; 6 sets of high printing accuracy: 0.03mm accurate color registration, multi-color can be overprinted. ;
2Silk printing process;
1. Screen printing
(1) Screen selection;
1. Nylon wire mesh: Nylon wire mesh has high strength, high wear resistance, high alkali resistance, slightly acid resistance, good ink permeability, small wire diameter, good elasticity and clear marking;
2 Polyester mesh: polyester mesh has good stability, high strength, corrosion resistance, better performance than nylon mesh, high tensile tension, suitable for high-precision printing;
3 Stainless steel screen: stainless steel screen has high strength, good stability, small wire diameter, high mesh, good resistance, long service life, poor elasticity, easy to be broken by impact, suitable for precision printing, not suitable for curved printing;
4 Nickel-plated polyester mesh: Nickel-plated polyester mesh combines the advantages of polyester mesh and stainless steel mesh. Wide application range, moderate price, poor corrosion resistance. The screen meshes are 40, 80, 100, 120, 200, 300, 400, etc. Generally, the meshes are large and the meshes are straight. A dense grid of fine wires with high resolution; coarse and coarse grids with low resolution. When printing on curved surfaces, please use a larger flexible screen, such as a nylon screen; when printing on large absorbable substrates, please use a screen with a larger mesh area; when printing on a smooth surface, please use a high-elasticity, high-tension screen Plate; when low-mesh screens are used for printing on rough surfaces, low-elongation and high-tension screens are used for high-precision printing, and screens below 200 mesh are used for printing signs, textiles, and knitwear; printing paper, metal and glass . When using leather, plastic or more than 200 mesh screen.
(2) Stretched screen frame, wooden frame, metal frame, plastic frame, combo frame, etc. When pulling the net, clean the screen frame first. The net can be set manually, mechanically or pneumatically. After pulling the net, it can be glued and trimmed. Elastic mesh requires proper screen tension, uniformity and stability, uniform wire, avoid diagonal tension, and parallel warp and weft. ;
(3) Stenter plate making
1 Direct method: screen cleaning→photosensitive adhesive→printing→developing→retouching. This gluing method is time consuming, the film thickness can be adjusted, the bonding is firm, and the printing is resistant.
2 Indirect method: photosensitive film → printing → development → film → film → repair. This method is complicated in operation, smooth in lines, weak in film formation, low in printing resistance, and unchanged in film thickness. 3Mixed method: screen cleaning→filming→printing→development→correction. This method is simple to operate, with fixed thickness, smoother lines and stronger rigidity.