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Flexo Glossary

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Capped plate A photopolymer printing plate with a surface layer of coating (cap) that is intended to enhance ink transfer and print quality.

Character Each individual letter, symbol or punctuation mark that makes up a full typeface.

Color Balance See Grey Balance .

Color proof A printed or simulated printed image of each process color (cyan, magenta, yellow and black) using inks, toners or dyes to give a simulated impression of the final printed reproduction.

Color Overlap The slight extension of one color over another.

Color Overlay A transparent overlay, usually acetate, on a Black & White drawing on which each additional color is indicated as a guide for reproduction. A term sometimes used at press-side referring to the number of colors which overprint each other.

Color Separation Film intermediates made from the color originals to determine and reproduce the proportional amount of cyan, magenta, yellow and black in the original. These films are used to produce printing plates for each color.

Colorant The color portion of the ink which may be pigment or dye or a combination of the two.

Compatible Refers to the ability to mix differing solutions or material together as a homogenous mixture, without resulting in "kick-out" or haziness.

Computer-to-Plate The process of imaging digital Cyrel® photopolymer plates directly from the digital art file.  Computer to plate (CTP) workflow bypasses the film imaging step and ablates the image data directly onto the laser ablation mask layer (LAMs layer) of the digital plate.  The plate is then UV exposed and processed in a manner similar to an analog photopolymer plate.

Continuous sleeve Continuous sleeve refers to a Flexographic printing form where a reusable or disposable print sleeve is assembled with a continuous layer of photopolymer prior to imaging, processing and printing. Continuous print sleeves and plates on sleeves are both printing forms used in an in the round (ITR) workflow. Continuous print sleeves allow for the imaging and printing of a continuous (seamless, endless) image. Plates on sleeves will have an image break at the repeat.

Continuous tone A photographic image that has not been screened and contains graduated tones from black to white.

Contrast The tonal gradation between the highlights, middle tones and shadows in an original or reproduction.

Converter Refers to that type of manufacturer who produces printed rolls, sheets, bags or pouches, etc., from printed rolls of film, foil or paper.

Copy Material, including art and text, submitted for reproduction. The term is also used to refer to the final printed result.

Co-Solvent One of two or more solvents in a mixture which together dissolve a solid.

Coversheet Layer of clear material that is taped, laminated, or used to cover and protect a surface from damage, dust, dirt, etc.

Crop marks Marks made on the outer edges of artwork to designate the area to be printed.

Cromalin® Off-press color proofs using DuPont Cromalin® materials.

CDI Originally CDI was an abbreviation of the name Cyrel® Digital Imager, the CTP plate imaging engine manufactured by Esko Graphics of Belgium. Recently the term CDI has become somewhat generic is often applied to any flexo CTP engine.

CTP See Computer-to-Plate

Cyan One of the subtractive primaries the hue of which is used for one of the 4-colour process inks. It reflects or transmits blue and green light and absorbs red light.

Cylinder In flexography, for no particular reason, most rollers in the printing press are called rolls with the exception of that upon which the rubber plates are mounted, and the one which receives the impression, and these are usually referred to as cylinders (i.e., plate cylinder or impression cylinder).