Is it Time to Bump the Bump Treating

BUMP TREATING IS a way of life in a package printing plant. Re-treating substrate surfaces before going to press helps provide a consistent and predictable print quality. Skipping it can leave a print job littered with pinholes, poor ink adhesion, and other printing blemishes.

Progress made in recent years in surface treating equipment has extended the longevity of treatment applied following extrusion, but printers still rely on bump treatments for successful runs. In fact, according to Ralf Weber, marketing, Erhardt + Leimer Inc., the trend in surface treating leans more toward multiple treatments. This is due to several reasons, Weber said, including: