What are the manufacturing processes of metal signs?

Metal flat-dry sign is a kind of metal sign which mainly uses the drying method of photosensitive plate to dissolve different colors into film and make it appear on the metal plate through development, so as to achieve the purpose of illustration and text. The following are the specific technological processes and formulas of several metal flat-dry signs that Beijing tour guides often come into contact with (the technological process of flat-dry signs):

1) blanking: it is required that the size of wool is generally larger than the plate-making size, and the board surface is flat and smooth without pits.

2) Pretreatment: ① polishing, ② wire drawing, ③ treatment and ④ oxidation.

3) Water seal: After degreasing and film removal, the plate is quickly immersed in water and cannot contact with air.

Corroded metal mark

Corroded metal signs are also called etched signs. Mainly check the convex metal mark or concave metal mark made by three steps of mask and post-etching treatment. Manufacturing technology of corroded metal signs;

1) blanking: according to the size (typesetting size) required by the drawing, the edge should be added with burrs not less than 5mm around. Model 720 pedal shearing machine is used for shearing plates, which requires a flat surface and no gross profit around.