Blocking is a term given to describe sticking between two or more layers of coated substrate, which may be printed, or unprinted, and in roll, sheet, or package form.
Why use Aqueous Coatings in Lithography? Productivity! When a sheetfed offset lithographer is asked, “Why do you use overprint varnishes?” The stock answer is that conventional oleoresinous overprint press varnishes are used to protect conventional litho inks. An expanded answer adds that rub and scuff resistance can be improved and the finish can range from […]
Setting & Drying Inks It’s all about the setting and drying of conventional sheet fed offset inks. Anti-set-off spray powder is used to prevent set-off, the unwanted transfer of wet ink to an adjacent sheet, in a press end pile. Spray powder not only provides a physical spacing between sheets of substrate, but also allows […]