The Dirt Estimation Chart (DEC) is the tool to estimate the equivalent black area (EBA) of dirt or other colored specks. The round black spots on the opaque white background make the same visual impression as the dirt speck on the material in which it is embedded.

Developed from and based on the TAPPI Dirt Estimation Chart, this custom transparency is used to measure the size of spots, defects, or inclusions over the range of 0.02 to 5.00 square millimeters in paper and other industrial materials such as textiles or plastics.

The Dirt Estimation Chart is the right tool to estimate the equivalent black area (EBA) of dirt or other colored specks. The round black spots on the white background of the TAPPI Dirt Estimation Chart make the same visual impression as the dirt speck on the material in …

TAPPI has a solution for dirt -- the kind that gets into your products during the manufacturing or shipping process. TAPPI’s Dirt Chart cards estimate the equivalent black area (EBA) of dirt or other colored specks.

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 has announced their popular Dirt Estimation Charts are back in stock, providing Quality Assurance professionals with essential visual inspection tools for maintaining and enhancing quality processes.

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.

Jul 8, 2019 · American National Standard TAPPI/ANSI T 437 om-21: Dirt In Paper And Paperboard outlines a method for the visual estimation of dirt in paper or paperboard in terms of equivalent black area.

3 days ago · TAPPI’s Dirt Charts are manufactured from an original negative produced on DuPont CRR film and estimate the equivalent black area (EBA) of dirt or other colored specks. The charts are processed on a rapid-access processor using Kodak/Fujifilm chemistry.

The TAPPI Size Estimation Chart is a transparent chart used to measure the size of spots, defects, or inclusions over the range of 0.02 to 5.00 square millimeters in paper and other industrial materials such as textiles or plastics.