The manufacturing of aluminum labels involves various processes, such as high-gloss finish, etching, oxidation, wire drawing, laser engraving, electroplating, spraying, dotting, enamel, and baking paint. Surface colors can be achieved using screen printing, four-color offset printing, and heat transfer printing.
Core processes for aluminum labels include black background with silver lettering, silver surface with black lettering, and silver background with silver lettering. Black background with silver lettering means the bottom of the label is black (which can be glossy black, matte black, or oxidized black), and the lettering can be high-gloss or wire-drawn. Silver surface with black lettering is typically manufactured by recessing the lettering, spraying the entire label with black paint, and then using an engraving machine to remove the paint from the surface. The surface can also be textured. Silver background with silver lettering can be divided into sandblasted and glossy backgrounds, depending on the bottom effect. Sandblasted backgrounds are manufactured by sandblasting, spraying, and spraying with silver powder.
Font color processing methods include screen printing, electroplating, and painting. Screen printing allows for multiple colors to be printed on the same plane. Electroplating of signs can be customized to different colors, such as black, gold, red, and chrome. Paint colors for signs can also be customized to customer requirements.
The bottom treatment methods for silver-background silver lettering are diverse, including oxidation (such as gold, silver, red, black, etc.), spray painting (common colors include black, blue, red, orange, gray, silver-gray, green, etc.), coating, sandblasting, and silver powder spraying.
High-gloss cutting uses CNC machine tools with cutting tools for rapid cutting, giving aluminum signs and other decorative parts a high-gloss brushed effect. Oxidation treatment, also known as anodizing, uses electric current to form an oxide film on the aluminum surface, resulting in rich colors, good electrical insulation, hardness, wear resistance, and extremely strong corrosion resistance. Aluminum plate etching signs use chemical solutions to etch the surface of the metal plate, followed by baking paint coloring.