Printing factory analysis of sign in screen printing plate making what method is there?

Printing factory analysis of sign in screen printing plate making what method is there? A, photographic plate making method of zhongshan screen printing signs printed CARDS used in the precision demand is higher, generally USES the advanced between indirect and direct, direct three photographic pattern method. Printing factory - - - - - - - > printing factory analysis of sign in screen printing plate making what method is there? A, photographic plate making method of zhongshan screen printing signs printed CARDS used in the precision demand is higher, generally USES the advanced between indirect and direct, direct three photographic pattern method. Printing factory - — Zhongshan screen printing signs indirect method ( 1) Prepare net frame and photographic film: the guy a good net box ( Nylon 220-260) Clean with 10% sodium phosphate solution, remove grease. Wire mesh coating is a kind of to gather enol as the main body of the photosensitive adhesive glue, membrane is at 0. 12-0. 06 mm transparent plastic sheet base on the sensitizer coating gelatin as the main body, before using graphic size, each side out of the 20 mm wide, powder on the membranes of the cloth to wipe clean dirt. ( 2) Exposure: the film and blank pressure inside the plate burning machine, using carbon lamp or xenon lamp exposure. Net frame and the distance of the light source for 50 to 60 cm, exposure time 2-6 minutes. ( 3) Development: after exposure, the thin film on the tablet, with warm water infiltration retinal 1 to 2 minutes, water nozzle spray, water soluble without photosensitive part ( Graphics part) After plate burning, development of thin film, until the image is clear. ( 4) Films: the exposure of film on the screen at the membrane surface, sign production in the back of the membrane with rubber plate or other straight plate, blowing gently, make contact with the network and firm, immediately put inside oven, under the condition of temperature 55 plus or minus 2 degrees bake for 8 to 12 minutes, after drying, the net box testing-run fixed on the plate. ( 5) To membrane method: in the process of exposure, development, version found unqualified, with warm water can be dropped the brush glue to produce immediately. If the version has been dry or production again after a period of time to film, one copy each of the available industrial sodium hypochlorite with water, soak 10-20 minutes. Or 5% naoh aqueous solution heat treatment network edition, can remove the film. Second, the printing factory - — Carbon paper printing method is also a kind of relatively simple manual plate making method. ( 1) Sensitive paper cutting, paper is a kind of mixture thicker coating and oxygen barium base paper made of carbon paper, according to the size of the graphics lay aside. ( 2) Sensitization: in 500 and 20 g in the preparation of ammonium dichromate solution soak for 3-5 minutes, remove carbon paper, the water distribution. ( 3) Exposure: stick carbon paper flat in a clean glass, film, coating on the male figure polyester film negatives, using printing-down machine exposure, exposure time 8 to 12 minutes. ( 4) Development: after exposure in 40 ~ 50 degrees warm water soak for a few minutes, the film and Yang chart with zinc oxide base paper from nature, carefully developed with warm water to form the text clear so far. ( 5) Quote: the system to put the good guy good screen net box below the first, on the screen covered with several layers of newspapers, the pressure on the glass plate, with the weight of 1-2 kg/cm2, the film and screen stick firmly, remove the weight and the newspaper, use the electric stove dry film, then remove the base paper, film graphics to the screen on. Qualified carefully check whether there is any defect on the graphics, the graphics on the screen around the coated with a layer of nitrocellulose enamel protection, the printing plate in a plate, and be ready to print. Scope of application of this process method is the same as the film engraving method. Third, printing factory, — Film engraving method is one of the manual plate making method, is relatively simple. Can be printed normally not too delicate monochrome pattern and text. ( 1) Spray system generated film paper: use tracing paper paste stick on flat boards, with the combination brush pen 1 rubber water ( Volume ratio) 1 set, gasoline, evenly coated on paper, dry spray soft varnish 3 - Five times, each time after spraying, with 40 ~ 50 degrees in oven drying, spray paint film thickness to 5 ~ 6 millimeter advisable, coating should be bright, smooth, no bubbles, no stain. ( 2) Carving graphics: stick film paper on graphics, press with kedao, compasses knife, ruler graphic carvings, gently remove paint film. ( 3) Quote: after carving graphics, can the past do silk screen frame on a quote. Method is to put the carved film under the net frame clamp, use cotton with a little thinner in the above after wipe gently, until paint film and screen glued down. Off tracing paper to dry after a few minutes away. If the paper is not gone completely, usable cotton touch water wipe. Blank part with lacquer coating layer, screen mesh plug. Printing after dry.