The CP strip is designed as a solution for binding difficult to bind papers with the Fastback 15xs Binding Machine. The new Powis Parker Fastback CP strip has a strip of center glue that is formulated for extremely aggressive adhesion. The Fastback CP strip works well with split sheets and coated paper but also creates a strong bind with smooth paper without using the Powis Edge splitter which is part of their high end photo book production cell. However, to obtain this strong bind the CP strip requires extra binding time (approximately 45 seconds). Still, you can get a lot of binding done in just a little time! And you'll have professionally perfect bound documents.