TAPPI Dirt Estimation Chart

These opaque Charts were developed to estimate the equivalent black area (EBA) of dirt or other colored specks. This opaque chart is to be used with TAPPI/ANSI Test Methods T213, T437 and T537.

TAPPI Dirt Charts are manufactured from an original negative produced on photographic paper by an ISO/IEC 17025:2017 accredited calibration laboratory and an ISO 9001:2015 accredited facility.