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.
  • Nuclear radiation resistance
    The ability of a material to withstand nuclear radiation and still perform its designated function.
  • Number of squares
    A ratio, rather than a physical measurement, of width to length used in determining resistance value by formula of a printed resistor.
  • Numbering
    Printing characters in a consecutive order.
  • Nylon dyeing
    A dye process using acid dye to color garments made of nylon.
  • Nylon monofilament
    (1) A single strand or thread of nylon of even diameter and smooth surface; (2) generally, the term indicates nylon screen printing mesh.
  • Object
    A graphic or picture that is embedded in a document file using object linking and embedding (OLE).
  • Object color
    The aspect of the appearance of an object dependent upon the spectral composition of the incident light, the spectral reflectance or transmittance of the object, and the spectral response of an observer.
  • Object linking and embedding (OLE)
    A standard method for inserting an object into a document, where the document retains a connection or link with its original program.
  • Object oriented
    A graphic image that is created with mathematical descriptions instead of pixels.
  • Obliteration
    The ability of an opaque overprint to hide completely the color underneath; also sometimes referred to as obliterating power.
  • Obscure
    Glass that has been made translucent by grinding, sandblasting, or acid etching.
  • Obsidian
    A natural glass that is produced by volcanic action.
  • Occupational exposure limit (OEL)
    Minimum allowable concentration of toxic substances in workroom air to protect workers who are exposed to toxic substances over a working lifetime.
  • Occupational Safety and Health Act (OSHA)
    A US federal law enacted in 1970 to protect workers from industrial hazards.
  • Ochre
    A naturally occurring yellow iron oxide used as a pigment in ink formulations.
  • OCR ink
    Ink that is composed of low reflectance pigments such as carbon black that can be read by OCR equipment.
  • OD
    Outside dimension of an item.
  • ODC
    Acceptable acronym for ozone depleting chemical or compound.
  • Off color
    Color variation from a sample or specification.
  • Off contact distance
    The space between the bottom of the screen and the top of the substrate; also refer to snap-off.
  • Off contact printing
    Screen printing with the print screen adjusted slightly above the substrate so that it does not make contact with the substrate except during printing.
  • Off square
    A material where two or more corners deviate from an exact 90° angle.
  • Offset (offsetting)
    (1) An indirect printing form; (2) The unintentional transfer of ink to the bottom of the printing screen, the back of a succeeding sheet, or other undesired surface.
  • Offset paper
    A grade of paper manufactured in a range of weights in white or light colors with good dimensional stability, cleanliness, and pick resistance; alterative term for uncoated book paper.
  • Offset printing
    Planographic printing by indirect image transfer.