Sodium 2%; Teardrop Flags And Banners
Caustic soda, 0.5%;
Sodium carbonate 1%.
Temperature of 45 ~ 60 ° C;
3 to 5 minutes.
c) weak corrosion: lye chemical degreasing of aluminum, the application of 30 ~ 40% nitric acid solution, and remove the aluminum surface of the oxide film (Al2O3), the base metal surface exposed, in order to facilitate oxidation of the coloring carried out smoothly.
(b) anodizing, and coloring. Teardrop Flags And Banners
a) sulfuric acid anodizing: sulfuric acid anodizing is 12 to 20 percent sulfuric acid solution through DC, and aluminum hanging in the anode oxidation treatment. After oxidation, Custom Beach Flags the formation of a layer of oxide film (Al2O2), this oxide film is transparent and colorless, high hardness, strong adsorption capacity, easy to dye closed, a good way to produce staining signage decorative products.
Solution formulations and process conditions:
Sulfuric acid (specific gravity 1.84) 180 ~
Voltage 10 ~ 20V;
Anode current density of 0.4 ~
Time of 30 to 50 minutes;
Cathode material aluminum. Feather Flag Poles
Preparation of the solution, do not pour the water into concentrated sulfuric acid in order to avoid acid bump.
b) staining (stained black as an example)
Black dye solution formulation and process conditions:
Acidic particles yuan (NBL) 12 ~
Glacial acetic acid (98%) 0.8 ~ 1.2ml / l.
Time 15 to 30 minutes; Feather Flags Wholesale
Temperature of 60 ~
Staining of preparation: the dye dissolved in some water (preferably distilled water), boil for 20 to 30 minutes later, still filtering impurities, and then add a little water. With acetic acid to adjust the pH to 5-6. Backpack Banner Advertising
Dyeing, it is necessary to control the dye temperature, pH, dye concentration and staining time, these factors affect the staining quality.
Aluminum, stained after washing, drying can be carried out following screen , dry, closed, dry, protective film, stamping text and graphics, high-light cutting process, made of high light three-dimensional embossed aluminum signs.
8. Screen plating plaque. The plaque is a product of many signs factory production. Plaque-based metal material, it requires solemnly, obviously, highly decorated. Traditional metal plaque, especially in the brass to corrosion words, note the black lacquer square plaque is the most common. With the changing of people's aesthetic point of view, the gradual development of commodity economy, the quality of the plaque also has a new and different requirements. Teardrop Flags And Banners As the sign industry into a screen technology, not only to promote the development of screen technology, but also provide the technical means to develop new products to the sign industry. The new screen legal system plating plaque signage product of the combination of electroplating, Custom Advertising Feather Flags screen process. Its basic approach is expressly graphics to screen method, copper, covered with ink to protect non-graphical parts of the trees silver parts of the graphics system electroplating of copper, nickel, chromium, and then mechanical plastic to protect the processing.