CoLibri is a commercial book covering system commonly used in libraries to create custom-fitted polyethylene book covers to protect and preserve paperback, hardcover, and/or red rotted leather bindings. This system requires a special CoLibri welding machine that heat-seals and trims the CoLibri covers together around the book (see Fig. 1).
CoLibri covers are:
Fig 1. - A standard CoLibri welding machine. Illustration by Jake Shonborn.