Metal flat sun signs sun cards mainly use photosensitive way, the film which was dissolved in different colors to make it through the development of methods was significant in the metal plate, so as to achieve a metal plate with a descriptive sense of purpose.
　　Here are some frequently come into contact with the metal flat plate concrete drying process and formula (flat sun signs, the process):
　　Flat aluminum plate sun: is the use of photographic plate method, the different pigments into the film inside, so that text, graphics presented in a metal plate, so as to explain the significance of having a metal plate.
　　1) material: wool size requirements are generally larger than the plate size (5mm or more), the board smooth, without potholes.
　　2) Pre-treatment: ① several ways polishing process ② ③ ④ drawing oxidation.
　　3) Water closed: will handle good board, through to oil, except after the film can not be quickly immersed in water and exposed to the air.
　　4) glue: glue configuration. Plastic: 200-230 grams of water: 1000ml, added photosensitizer (weight casein, ammonium) boiling water and cook for 2 hours to fully dissolve the glue, the temperature dropped to 30-50 ℃ 25-30 grams after glue evenly coated in metal plate, drying stand.
　　5) copy: You can use SB750 vacuum type machine photographic copy proofing, light 60-90cm time after 40-80 seconds to take, in warm water 1 minute into the color developing solution for staining.
　　6) Paul Light: After fully dyed brand, dry it with a brush or spray gun painted with gloss paint (general paint brand with the eyes or free baking gloss paint).
　　7) Cut into.
　　Flat sun signs are generally used for interior products, small household appliances and non adverse weather affected equipment. The advantage is plate-making process is simple, fast, timely delivery, defective rate and low fees. The disadvantage is that by the sun and rain, easy to fade. You can not do outdoor signs.