Dirt Estimation Chart

The TAPPI Dirt Estimation Chart is an opaque chart used to estimate the equivalent black area (EBA) of dirt or other colored specks over the range of 0.02 to 5.00 square millimeters. This opaque chart is to be used with TAPPI/ANSI Test Methods T213 and T437 .

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. 

You may also be interested in TAPPI's Size Estimation Chart (Transparency) and Calibrated Size Estimation Chart  (Transparency).  

Frequently Asked Questions

Questions regarding TAPPI Charts? Contact press@tappi.org.

New Volume Discounts for TAPPI Chart purchases: