Glossary

The PRINTING United Alliance Glossary serves as an excellent industry terminology resource. It is the language by which we all communicate. Without it, universal understanding would be impossible.

To keep our constituents well informed about changes to the increasingly complex industry terminology, PRINTING United Alliance has developed this glossary of terms. Definitions are for general reference only. Usage may vary between companies, individuals, or national and country customs. The information presented is as accurate as the authors and editors can ascertain and PRINTING United Alliance assumes no responsibility for the use of information presented herein.
  • Emissivity
    The ratio of energy emitted by an object to that emitted by a theoretical object that radiates the maximum amount of energy at the same temperature such as a blackbody.
  • Emulsifying agent (emulsifier)
    Material used to facilitate the preparation of emulsions and to improve their stability.
  • Emulsion
    A liquid or semi-liquid light sensitive compound usually of silver halide grains in a thin gelatin layer.
  • Emulsion side
    The side of the photosensitive stencil or photographic film that is coated with the light sensitive material.
  • Emulsion speed
    The rate of response to light under standard conditions of a light sensitive material.
  • Emulsion up
    Refers to a photographic film positive or negative where the emulsion side is placed facing up for direct contact with a photostencil.
  • En space (N) (en quad) (nut)
    One-half the width of an em; a unit of measure in printed matter that is one half the width of an em.
  • Enamel
    (1) In glass decorating, a dry powder substance composed of a mixture of frit and inorganic pigment; (2) A screen printing ink or coating the dries hard and glossy; (3) A coated paper with a glossy surface.
  • Enamel stock
    Coated paper with a hard, glossy surface usually obtained by calendering the clay impregnated surface.
  • Encapsulated ink
    Ink or ink particles covered or enclosed with a coating to produce a free flowing dry system that can be activated by thermal change or physical pressure such as scratch and sniff ink.
  • End point density
    The highlight and shadow densities representing the desired dot reproduction at both ends of the halftone range.
  • Endothermic
    A chemical change or transformation that absorbs heat.
  • Engineer grade
    A second grade reflective sheeting made to specifications for a variety of uses including highway signs; also referred to as diamond grade.
  • Engineered prints
    Cut-sheet transfers (not continuous rolls) that may be individual products such as bath rugs or individual parts of a garment.
  • Engineering control
    Any equipment, material, or process that reduces the source of a hazardous exposure.
  • Engineering grade plastic
    Plastic with properties suitable for engineered product requiring up to 125°C (257°F).
  • English finish
    A grade of book paper that has a smooth non-glossy paper finish.
  • Englobe
    A slip or liquid clay used for decorating.
  • Engobe
    A slip coating applied to a ceramic body to mask the body color.
  • Engraving
    Any recessed printing plate that is produced by an etching or cutting.
  • Enlargement (enlargement) (blow-up)
    A reproduction or copy larger than the original; also called blowup.
  • Enlarger
    A device for projecting a photographic positive or negative onto a sensitized material or onto a wall of a darkroom for the purpose of obtaining a larger image.
  • Entrapped carbon
    Dark carbon film between enamel/gold film and glass usually due to rapid firing or lack of oxygen in the lehr.
  • Environmental influences
    All conditions of weather, sunshine, heat, rain, and cold including gases that may be present in exterior exposure conditions; interior environment may include heat, humidity, vapors, fumes, and all other characteristics of surrounding atmosphere.
  • Environmental Protection Agency (EPA) (USEPA)
    A US government agency formed to implement the Federal Water Pollution Control Act of 1972 and subsequent environmental legislation, including the Clean Air Act and Solid Waste Amendments.