1. Direct plate making method

(1) Direct plate-making method of photosensitive paste

Method: Apply a certain thickness of photosensitive paste (usually diazonium salt photosensitive paste) on the stretched screen, dry it after coating, and then use the plate-making negative film to fit it into the exposure machine for exposure, after development and rinse After drying, it becomes a screen printing screen.

Technical process: The photosensitive paste is prepared with stretched net-degreasing-drying-coating-drying-exposure-development-drying-revision-final exposure-sealing.

⑵Sensitive diaphragm direct plate-making method

Method: The photosensitive film is commonly known as water film, which is made of a transparent plastic film with a thickness of 0.1mm as the base, and a layer of photosensitive emulsion is coated on one side of the film. The upper film is attached to the silk screen by capillary action. After drying, the plastic film base is torn off for exposure and development, and finally the desired pattern is obtained.

Technical process: stretched net-degreasing-moistening-filming-drying-strengthening-exposure-developing-drying-revision-sealing

2. Direct and indirect plate-making method

The method of direct and indirect plate-making is to first place the photosensitive film coated with the photosensitive material on the work surface, and put the stretched wrist frame on the base, and then put it in the frame. Into the photosensitive paste and pressure coating with a soft squeegee, after fully drying, the plastic film base is removed, the photosensitive film wrist screen is attached to the printing plate, and the screen printing screen is produced after development and drying.

Technical process: stretched net-degreasing-drying-peeling off the film base-exposure-developing-drying-revision-sealing

3. Indirect plate making method

Method The indirect plate-making method is to expose the indirect film first, harden it with 1.2% H2O2 and develop it with warm water. After drying, it can be made into a peelable graphic negative. During the plate-making, the film surface of the graphic negative is closely attached to the stretched screen. By squeezing, the adhesive film and the wet screen are adhered to each other, the base is peeled off, and the screen is made by drying with the wind.