BOOK BINDING & LAMINATING
Perfect Binding generally requires that the front
and back covers lay absolutely flat, even after all stages of production—from
printing to final trimming and boxing. Because moisture of paper can vary so
much from paper manufacturer to boxing, the proper type of laminating is
imperative. Nylon ("lay flat") film is recommended for perfect binding. Nylon
film is permeable in nature, allowing moisture to escape through the outer
layer. This important feature is what causes perfect bound books to stay
flat—even on a display shelf—and never curl. This fact is guaranteed by the
manufacturers of the film. Nylon films come in both gloss and matte. Wax-free inks are recommended to promote optimum adhesion.
Case Binding, or hard bound binding uses primarily
polyester films, available in both standard gloss and matte, or in
glueable/stampable in clear only. Selection of either film is dependent on the
type of glue to be used in the casing process. Most animal glue requires the
usage of glueable/stampable (PETGS) films, where white glues allow standard
polyester (PET) films. Wax-free inks are recommended to promote optimum adhesion.
Saddle Stitched books are successfully done with
almost any film including polypropylene films. Polypropylene (OPP) films are
crystal clear in gloss, and have a very consistant look in matte. More prone to
scratching, stretching and curling, OPP films are economical and are used in
Plastic Coil and Wire-O
binding utilize all three types of laminating films. Where curl of the
covers might be a concern due to excessive moisture and lack of air
conditioning, nylon would be recommended film.