Corroded metal labels are also called etching labels. Mainly check embossed metal labels or indented metal labels made by three-step processing of masking and etching post-processing. Manufacturing process of corroded metal labels:
Blanking: According to the size required by the drawing, plus a burr of not less than 5mm above the surroundings. The 720 type foot-operated shearing machine is used for shearing, and the surface is required to be flat and there is no margin around it.
Surface treatment of metal corrosion labels:
1.Mechanical polishing: Use a 2.2-4 kilowatt polishing machine to mechanically polish the wool. The cloth wheel uses a 300-350 motor with a speed of 2000-3000 revolutions/min.
2.Alkali treatment: Boil the metal plate with 10-15% sodium hydroxide in an aqueous solution at 65-85°C for 10-30 seconds, then wash it with water and immerse it in a 5% heavy acid aqueous solution.
3.Powder treatment method: Use a flat brush dipped in old powder to scrub the plate evenly with a cross method to remove the stained surface or remove the effect of oxygen skin, and then seal it with 5% potassium dichromate aqueous solution.
4.Wire-drawing treatment method: use mechanical or manual wire-drawing method to wire-draw the metal plate surface to achieve the metal surface regeneration effect.