P.I.R.A. test

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An abbreviation for the Printing Industries Research Association test used to evaluate the condition of vegetable tanned leathers. The P.I.R.A. test examines the extent of deterioration caused over a seven day period by the exposure of a leather specimen to Sulfuric acid and Hydrogen peroxide. Leather that becomes black and gelatinized is deemed unsatisfactory for use.

Synonyms and Related Terms

Printing Industries Research Association test; PIRA test

Resources and Citations

  • Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982