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SGIA

Specialty Graphic Imaging Association
SGIA Glossary

Definition Glossary

Sixth Edition

Language and our ideas about how it is interpreted change rapidly. The Specialty Graphic Imaging Association (SGIA) is aware of this and continues its effort to keep our constituents well informed about changes to the increasingly complex industry terminology. This publication represents the most recent changes.

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C-stage

The final stage in the reaction of thermosetting resin where the material is relatively insoluble and infusible; thermosetting resin in a fully cured state

C1S

Acceptable abbreviation for coated one side.

C2S

Acceptable abbreviation for coated two sides.

cabinet oven

A device for thermal treatment by convection, mounted on a floor stand, usually used for testing in the lab, or for very low production of small parts.

cache

A temporary storage area for information which locates itself between the hard disk and the RAM by employing intuitive logic. It also speeds up the access time of the data.

CAD (Computer Aided Design)

Software used to produce designs and drawings for architectural, engineering and scientific applications.

cadmium red

An inorganic red pigment composed of cadmium sulfide and cadmium selenide that is resistant to light, heat, and soap.

cadmium yellow

An inorganic yellow pigment composed of cadmium sulfide and lighter shades of zinc sulfide that is resistant to light, heat, and soap.

calcine

To heat a ceramic batch material to a temperature below the melting or fusion point causing loss of moisture, reduction, or oxidation.

calender

(1) A configuration of heated rollers used for flattening one or both sides of synthetic screen printing mesh; (2) To prepare sheets of material by pressure between two or more counter rotating rolls; (3) A set of cast iron rollers with highly polished surfaces situated at the dry end of a paper making machine.

calender winkle

Crease in paper web produced as the web passes through the calender rolls.

calendered fabric

Screen mesh that has been flattened on one or both sides by passing it through heated rollers.

calendered film

A film with a very glossy surface obtained by passing the film between polished rollers under pressure, and sometimes under elevated temperature conditions.

calendered finished (calendered)

Any paper with a surface glazed by means of steel or cast iron rollers with hardened surfaces.

calendering

(1) A finishing process that flattens one or both sides of a screen mesh reducing mesh thickness and opening size; (2) A way of manufacturing plastic sheets by first converting the resins into a dough like mass then passing it between heated pressure rollers to form a sheet with a glossy or textured surface; (3) A method of producing a very high gloss surface on paper stock by passing the sheet between a series of pressure rollers; (4) A finishing process for fabric creating high luster, glazing, embossing, and moiré.

calibration

To determine, check, or rectify the graduations of any instrument giving quantitative measurements.

calibration bar

A strip of tones attached to a negative, proof, or print used to check print quality.

calibration curve

A graphic representation of the calibration record.

calibration cycle

Calibration in ascending and descending directions.

calibration log

A record documenting when an instrument was calibrated and who performed the calibration procedure. (Other items that may be documented are temperature, relative humidity, and any other specific items of data beneficial in troubleshooting an instrument malfunction).

calibration standard

A reference material of a known or fixed value used to calibrate an instrument such as a calibration standard that can be traced to the US National Institute of Standards and Technology (NIST).

calico die-cut transfer

A cotton print fabric with heat seal backing; will adhere to cotton blends.

caliper

(1) The thickness of a substrate material usually expressed in mils or points, both being terms expressing thousandths of an inch. (0.050 is expressed as 50 point usually for paper stocks; or 50 mils when plastics are designated by thickness); (2) An instrument used to measure a substrate.

calorie

(1) The quantity of heat necessary at normal atmospheric pressure to raise the temperature of one gram of water one degree centigrade; (2) A standard unit measure of heat, equal to 4.1840 joules; a thermal unit.

calorific value

The amount of heat measured in calories or Btu’s released by combustion of a unit quantity of fuel.

camera

A device for taking photographs, generally composed of a lightproof enclosure having an aperture with a shuttered lens through which the image of an object is focused and recorded on a photosensitive film or plate.

camera angle

The angle defined by the position of the subject matter in relation to the camera lens; viewpoint.

camera back

The paper/film-holding section of a process camera, used for holding photosensitive material to the filmback.

camera exposure

The subjecting of light rays reflected or transmitted by a subject being photographed, under controlled conditions of time and intensity, of a photosensitive film for the purpose of producing a latent image thereon.

camera lens

An arrangement of circular concave or convex pieces of glass that control incoming light rays by focusing them on a ground glass or photosensitive film.

camera mount

The trace or base where the camera is fixed or secured to eliminate vibration.

camera process

A camera designed to create a halftone image or color separations for photomechanical reproduction.

camera shutter

A device that controls time and amount of light that acts on sensitive material.

camera-ready art

(1) All printing elements prepared to be photographed; (2) An original design, completely finished as it is to appear in the reproduction.

can top easel

An easel for display cards that are to be placed on top of round metal cans.

cancellation proof

The final print in a fine art edition.

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