| Metal flat signs are mainly the use of photosensitive way, will be different colors into the film inside, so that through the development method was found in the metal plate, so as to achieve the purpose of a description of the purpose of a metal plate. The following are several kinds of metal exposure signs often exposed to the specific process and formula (flat signs of the process): Flat aluminum signs: the use of photosensitive plate method, the different paint into the film inside, so that the text, the pattern presented on the metal plate, so as to achieve the meaning of the metal nameplate. 1) cutting: wool size requirements generally larger than the plate size (5mm or more), the board is smooth, no pit concave. 2) Pretreatment: ① polishing ② drawing ③ treatment ④ oxidation and other methods. 3) Water closed: will handle the board, after the oil, in addition to film, quickly immersed in water and air contact. 4) glue: glue configuration. Glue: 200-230 grams of water: 1000ml, boiling water for 2 hours to make the glue fully dissolved, so that the temperature dropped to 30-50 ℃ by adding photosensitizer (ammonium tyreeate) 25-30 grams after the glue evenly coated Metal plate, dry stand. 5) copy: can be used SB750 vacuum drying machine for photosensitive copy, light 60-90cm time 40-80 seconds to take, put in warm water for 1 minute into the color liquid for dyeing. 6) Bright: After full dyeing of the brand, after drying, with a brush or spray gun painted varnish (usually with eye paint or no baking varnish). 7) cut into. Pingtian signs are generally used for indoor products, small appliances and non-harsh climate impact on the equipment. The advantage is that the plate making process is simple, fast, timely delivery, the cost of defective and low. Disadvantages are sun and rain, easy to fade. Can not do outdoor logo. |
