1. It cannot be placed on the uneven contact surface; the surface sheet can be peeled off before the negative film is exposed; after peeling, if it is bent excessively, the protective layer will be wrinkled, and these wrinkles will leave stains after exposure to plate making. 2. The exposed plate of the mask packaging […]

Affected by the epidemic all over the world, medical masks must be worn in public places. The demand in society has increased, and the demand for corresponding mask packaging has increased. Masks are generally packaged in two ways, one is made into packaging bags, and the other is made into automatic packaging rolls. Tea packaging […]