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.
  • Diathermal
    The property of transmitting radiant heat.
  • Diazo
    (1) A photosensitive chemical or process by which screen printing emulsions are made sensitive to actinic light; (2) A compound containing a group of two nitrogen atoms (N2) united with one hydrocarbon radical or with one hydrocarbon radical and another atom or group of atoms.
  • Diazo emulsion
    An emulsion for making a screen printing stencil that is sensitized with diazo chemicals rather than a bichromate sensitizer to make it light sensitive.
  • Diazo-photopolymer
    Refer to dual-cure emulsions.
  • Dice
    Very small cubic fractures in highly stressed glass.
  • Dichlorobenzidine yellow HR
    An organic yellow pigment with good bleed and fade resistance, fair in tints.
  • Dichroic color
    Property of having two peaks in the spectrophotometric reflectance curve causing it to respond differently to different light sources.
  • Dichroism
    The property of showing different colors depending on the thickness of the substrate or concentration of printed ink.
  • Die
    A tool for cutting out, forming, or stamping material.
  • Die board
    The plywood base into which the steel rule dies are inserted.
  • Die cut label
    Pressure sensitive label on a release liner from which the matrix has been removed.
  • Die cut prespaced
    The die cutting of pressure sensitive sheet to pre- determined patterns, the die being made to accurately space the portions on the sheet, then, application tape is applied to the facing to maintain the prespacing of the pattern or parts.
  • Die cut to liner
    The die cutting of a pressure sensitive sheet to the depth of the face layer only, without cutting the backing or support sheet.
  • Die cutting
    Process of blanking or cutting a sheet or roll stock to a predetermined shape.
  • Die line
    The line or marking on a tracing that indicates where the blades of the die should strike in cutting.
  • Die press
    (1) A manually operated machine for forming steel rule dies; (2) A die cutting press.
  • Die, male and female
    Convex and concave matching dies.
  • Dielectric
    A non-conducting or insulating material; a substance with electrical conductivity less than a millionth (10-6) of a mho.
  • Dielectric breakdown
    Any change in the property of a dielectric material that causes it to become conductive.
  • Dielectric constant
    Related to the force of attraction between two opposite charges separated in a uniform medium; determinant of the electrostatic energy stored per unit volume for each unit potential gradient, (plastics have a dielectric constant of 2.5 to 7).
  • Dielectric ink
    A printable compound which has insulating properties on drying, used for separating portions of circuits for encapsulating components or entire modules for protection from environmental influences.
  • Dielectric strength
    (1) The maximum voltage that an insulator can withstand, expressed in volts/mil, without allowing current to pass through; (2) Insulating value of material against the flow of electricity.
  • Differential pressure
    The difference in static pressure between two identical pressure taps at the same elevation located in two different locations in a primary device.
  • Diffuse dither
    A method for printing continuous-tone images on laser printers in which the grayscale information is represented by randomly located printer dots.
  • Diffuse transmission
    Process by which incident light that passes through an object and is redirected or scattered over a range of angles.