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.
  • Alkali
    Any chemical that reacts on contact with an acid; capable of neutralizing acids; pH greater than 7.
  • Alkali removable
    Resist ink, which when dry, are removable by application of a caustic compound or alkaline solution.
  • Alkali resistance
    The relative ability to resist the action of alkalis.
  • Alkali test
    Used to evaluate the resistance of printed labels to alkalis.
  • Alkaline dip
    Term used for that step in stripping or removing of an alkali soluble resist when an etched circuit board is dipped and soaked in a high strength (6-10%) solution of a sodium hydroxide, softening the resist which is subsequently removed in a separate water rinse.
  • Reflex blue (alkali blue)
    A strong organic blue pigment with the highest tinctorial strength of any blue pigment.