How to distinguish common metal signs

Writer：admin Time：2023-09-06 09:14 Browse：℃

　　Metal signs are mainly made of raw materials such as copper, iron, aluminum, zinc alloy, lead-tin alloy, and other materials through stamping, die-casting, etching, printing, enamel, imitation enamel, baking paint, and other processes; How to distinguish different metal nameplates? Let's take a closer look together:

　　Common metal nameplates:

　　1. Stamped nameplate

　　The material used for stamping the nameplate is metal, which has a strong three-dimensional effect. The surface of the nameplate is convex and concave. Stamping the nameplate requires a mold, which is suitable for mass production. However, stamped nameplates also have their drawbacks, such as a relatively single pattern and color, which cannot be gradient colored. Stamped nameplates are sometimes referred to as high gloss nameplates, high gloss aluminum nameplates, etc.

　　2. Etched nameplate

　　Apply a layer of corrosion-resistant photosensitive ink evenly on the stainless steel plate, then place a film negative on top and expose it with ultraviolet light. After the transparent part of the film negative is penetrated by ultraviolet light, it will react with the photosensitive ink to form a weak alkaline resistant coating. The photosensitive ink below the black part of the film negative is not resistant to weak alkali. Remove the film film and immerse the stainless steel plate in a weakly alkaline sodium carbonate solution. The coating on the parts that are not resistant to weak alkali will react chemically with the sodium carbonate solution and fall off. The metal in these areas will be exposed, and patterns will appear on the stainless steel plate. Apply a layer of anti-corrosion protective film on its back, place it in an etching machine, and wash the exposed surface of the stainless steel plate with a ferric chloride solution. The trivalent iron ions in the ferric chloride solution will quickly oxidize and etch this part of the stainless steel plate. We can clearly see through macro photography that local stainless steel plates have been etched. Etched nameplates, such as tool plates, sales signs, and some panel graphics and text of the entire equipment have obvious sunken adhesive film dyeing labels. The process is simple, the cost is low, the colors are bright, and should be able to be dyed into multiple colors.

　　3. Offset nameplate

　　The image and text of offset printed nameplates have strong expressive power, and can be made into various colors and layers. The colors are bright and light resistant, with high work efficiency, suitable for mass production, suitable for processing various materials, and can be combined with various processes to produce electronic industrial products, instrument panels, instrument scales, etc.