Cover weight
heavier-weight (thicker/more-rigid) paper consisting of various grades
CVR
Cover
Negative
the image on a film that inverts color
Overlay
transparent cover sheet on artwork often used for instructions
Self cover
a cover of the same paper as inside text pages
UV Coating
protective liquid coating applied to printed sheets (similar to varnish), bonded and cured with ultra-violet (UV) light
Varnish
clear ink-like substance that is applied to printed surfaces for appearance and protection