Most plastics cups, such as polyethylene, polypropylene and PVC, have chemically inert and nonporous surfaces with low surface tensions causing them to be non-receptive to bonding with printing inks, coatings, and adhesives. Although results are invisible to the naked eye, surface treating modifies surfaces to improve adhesion. Corona treater is responsible for this task in offset cup printers.
The plate of dry offset printers is composed of different parts: Right And Left Sidebar Hoes: The holes are used for stretching the plate on the cylinder. They are also used to help better plate punch. Print Area: The area marked as “AZAR SAYAN” is called print area. Your artwork for getting printed is placed here. The size of the plate is different for every printing machinery. Top and Bottom Bars: The bars are used for adjusting the last rollers […]
