Printing factory reveal direct plate-making and indirect plate making method

Printing factory reveal direct plate-making and indirect plate-making process method direct plate making method: post box use aluminum frame, don't have to stretch mesh tension net maneuverability, air pressure in the 5 - 6 kg/cm2, the use of acetal adhesive nets, tension tightness measured with tension, tension 5 - 7 male - - - - - - - > printing factory reveal direct plate-making and indirect plate making legal method direct plate making method: post box use aluminum frame, don't have to stretch mesh tension net maneuverability, air pressure in the 5 - 6 kg/cm2, the use of acetal adhesive nets, tension tightness measured with tension, tension 5 - 7 kg, sink size should be less than 2 mm. Cleaning screen: washing powder, detergent, such as ethanol was used as clean lotion, clean both sides of the screen, clean with clear water, after drying. The purpose is to make network better and emulsion adhesive. Scraper ( Coating, coating) : coated photosensitive glue scraper can be made from stainless steel, also can be made from organic glass scraper. Its length is generally smaller and screen box inner diameter ( The length of different kinds of scraper as a standby) 。 The edge of the scraper must thin without blade, smooth and straight, not allowed to have defects such as concave and convex, burr, scars, to heart impact plate making quality. Printing factory coated screen sensitive glue, each with three times to dry again, 3 - to be continuous 4 times, until the thickness of the film to need to be exposed. The temperature of the drying oven, ideally with adjustable temperature drying oven. Sensitive glue drying temperature and control in 40 degrees or so commonly, baking time is too long or the temperature is too high, will affect the quality of photosensitive layer. Security lights: studio lighting light source, generally USES orange, yellow or red light as security lights, but from the vision, orange light source is comfortable. Its brightness can clearly see all objects as appropriate. Inspection blank: blank must be examined before plate burning, including the columns of the dust, blank black degrees, the lines are short, sand hole defects, etc, and the image character of positive and negative is in line with the requirements. Indirect method: prepare net frame and photographic film: the guy a good net box ( Use 220 - nylon yarn 260 purpose) Clean with 10% sodium phosphate solution, remove grease. Line network photosensitive film membrane is a kind of to gather enol rubber as the main body of the photosensitive adhesive, film 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. Exposure: the film 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 - 2-60 cm, exposure time 6 minutes. Development: after exposure, the thin film on the tablet, retinal 1 - with warm water infiltration 2 minutes, water nozzle spray, water soluble without photosensitive part ( Graphics part) After plate burning, development of thin film, until the image is clear.