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C1S: (Coated One Side) Describes a paper stock that is coated on one side.

CC1S: (Cast Coated One Side) Describes a paper stock that has a high gloss coating on one side.

C2S: (Coated Two Sides)

CC2S: (Cast Coated Two Sides)

Calendaring: A buffering process completed during paper manufacturing that polishes the sheet surface making it less prone to printing production difficulties.

Calibration Bars: Are used to control screen percentages for printing and proofing. Usually varying shades of CMYK, from 0% - 100%, located on signature or press sheet.

Camera Ready Artwork: Paste up artwork (mechanical) in which all type is set and sized correctly and pasted up in correct position. All corrections have been made, all color breaks have been made and is complete. Does not need to have traps and/or reverses built in, but should include keylines and F.P.O. prints for photographs.

Capstan Design: In imagesetters, a system for moving the film or paper past the laser. The alternative is the drum design, in which paper or film is wrapped around a rotating drum.

Center Marks: Press sheet marks that appear in the center of the plate. Used to position the printed area on the plate.

Chokes and Spreads: Overlap of overprinting colors to avoid color or white fringes or borders around certain detail. See Trap.

CMYK: Cyan, Magenta, yellow and Black. The four process colors that are used in four-color printed reproduction. In desktop publishing it's one of the color models; the others being HSB, PMS and RGB.

Color Key: Color overlays made from the film separations. Used to proof color and balance.

Color Model: A way of describing color. (i.e. CMYK, HSB, PMS and RGB)

Color Proof: The final corrected proofs either on a color laser printer, Color Key or Match Print.

Color Separation: The process of turning a digital file into the necessary primary printing components (CMYK or spot colors).

Commercial Registration: Color printing on which misregistration is allowable within +/- one row of dots.

Composite: (Composite Proof) The black and white proof of a publication or, for a color publication, one sheet per publication page (rather than separate sheets for each overlay) printed on a color printer.

Contact Print: A photographic same size copy made by exposure of a sensitized emulsion in contact with the transparency, negative or positive with the exposing light passing through the master image.

Contact Screen: A photographically-made halftone screen having a dot structure of a graded density, used in a vacuum contact situation with a high contrast (litho) frame.

Continuous Tone: A photographic image which has not been screened and contains gradient tones from highlight to shadow. The original can be either black and white or color and contain no dots.

Contrast: The tonal gradation between highlights, middletones, and shadows in an original or a reproduction. The visual relationship of the original to the reproduction when white to black ranges.

Control Strips: Series of color bars and percent tints placed just outside the final image area; used to help maintain consistency during print runs.

Copy: Any furnished material that is to be used in the production of printing.

Creep: The slight but cumulative extension of the edges of each inserted spread or signature beyond the edges of the one that encloses it in a saddle stitch bind.

Crop: In order to eliminate portions of the copy, photograph or artwork, cropmarks are placed on the original or overlay to indicate which portions are to be eliminated.

Crop Marks: Fine lines on a press-sheet used to trim the sheet to final size.

Cyan: One of the colored inks used in four-color printing. One of the subtractive process colors; reflects blue green and absorbs red.

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