Signs up to the amount of printing materials are aluminum, copper, stainless steel, aluminum. There are also plastic, polyester, paper. Aluminium Signs are signs varieties is
widely used kind, with a beautiful, bright, high hardness, wear resistance, wide application, dosage and other characteristics. Used in machinery, electronics, instruments, meters, household
appliances, hardware, watches, cosmetics and packaging. Pre-treatment of aluminum substrates have a variety of methods, depending on the use, mainly degreasing, sandblasting, wire drawing,
polishing, oxygen grease.
1, oil: the surface of an aluminum substrate with a certain affinity Hu ink, the need to remove surface oil and oil, can wipe cotton dipped in gasoline. It can also be used for
chemical degreasing alkaline solution, such as sodium sulphate 30-50 g / l, sodium 40-60 g / l, sodium 10-15 g / l, at a temperature of 60-70 degrees immersed 2-5 minutes degreasing.
2, sandblasting: sandblasting to improve the adhesion of the ink and the metal material is generally used sandblasting machine dedicated for discharging treatment, if 0.5-1 mm
thick aluminum plate, sandblasting sand of 0.05 to 0.15 mm in diameter, and available river sand, sieve after use.
3, drawing: also known as twist processing is the processing method of the delicate mechanical friction straight lines in the aluminum surface. It was a relatively new
decorative surface treatment process, we can overcome the defects such as scratches on the aluminum surface. Improve utilization of materials. There are two thick wire drawing lines to find
ways and filaments, usually with a diameter of 0.1 mm stainless steel wire brush or scouring pad brush, nylon belt can also be processed.
4, polishing: to overcome the aluminum material surface defects and improve surface finish. Polishing and chemical mechanical polishing polishing points. It is the use of
mechanical polishing cloth polishing wheel machine, multi-chemical polishing is carried out in an acidic solution, such as 15% sulfuric acid, 10% nitric acid, the temperature of 90-100 degrees,
time of 2-3 minutes.