EMBOSSING - A process performed to stamp a raised image into the surface of paper, using engraved metal embossing dies, extreme pressure and heat. Embossing styles include blind, register embossed, and foil embossed.

EXPANSION ENVELOPE - Much like a grocery bag. The gussets in an expansion envelope allow it to be expanded to accommodate such things as books, binders, manuscripts, and countless other bulky items. They are made in both open end and open side styles, most commonly of 40 lb. Kraft paper.

EXPANSION SCORE - An additional score on a seal flap, running its length in order to accommodate bulk contents.