CAMERA READY ART WORK - Professionally produced black and white layout of exact copy to be printed. This includes all typesetting and/or logo art. This is photographed in order to produce a negative for plate making.
CATALOG ENVELOPE - An open end center seam envelope with the seal flap on the short dimension. Catalog envelopes with a single side seam are not commonly used, but are available upon special order.
CELLO - Super clear cellophane window patch material. More costly than poly. Due to the expense, cello is not used as much as it once was. It can be too reflective, causing errors in OCR reading.
CENTER SEAM - Most common on open end envelopes, this is the permanent seam that joins the two side flaps together at the center of the envelope, running from the bottom of the envelope to the throat of the envelope.
CHIP BOX - A chip board folding box which is somewhat inexpensive in packaging envelopes.
CLASP ENVELOPE - Almost always made from an open end envelope, a clasp is secured to the back side of the envelope with a small reinforced hole punched in the flap for the clasp to slip through and be secured. The flap is usually gummed. The clasp can be used for added security if the seal is activated, or can be used repeatedly if the gum stays inactive.
CLOSURES - Various methods of securing the seal flap to the back of the envelope.
COIN ENVELOPE - A small open end envelope ranging in size from a #00 -11/16 x 2 3/4 to a #7 -3 1/2 x 6 1/2.
COLOR KEY - An overlay proof composed of an individual acetate sheet for each color.
COLOR SEPARATED ART WORK - Each color requires its own art work for producing negatives and plates.
COMMERCIAL STYLE - Open side, diagonal or double side seam envelope with a commercial style flap. The most popular envelope for business, it is sometimes referred to as an "official" envelope. It is readily available in many paper varieties and comes in 11 common sizes, with or without a window.
COMMODITY ENVELOPE - Envelopes usually mass produced in standard sizes from open line papers, such as white wove and brown kraft. They are available for all customers of record to purchase.
CONVERTING ONLY - Paper is supplied by the customer for conversion into envelopes.
CORNER CARD - Return address and other identification of the sender in the upper left-hand corner.
COUPON HITCH-HIKER - A remittance envelope with a perforated coupon extending from the flap, and a perforated tail extending from the back flap.
CROSS CUT - Envelopes cut so that the paper grain is perpendicular to the paper side seam fold. This increases folding difficulty.
