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The method according to this standard is used to assess the opacity of papers. It is a measure of the opacity of papers in the visible range. This document was prepared by the Working Committee NA 074-02-02 AA "Optische Prüfverfahren für Papier, Pappe und Halbstoffe" ("Optical test methods for paper, board and pulps") at DIN Standards Committee Paper, Board and Pulps (NPa).
This document replaces DIN 53146:2000-04 .