Historical
TAPPI T 213 om-15
Dirt in pulp - chart method
- This method (1,2) is adapted to the numerical estimation of dirt in pulp and recycled pulp in terms of equivalent black area.
- The results will differ from those obtained by TAPPI T 246 "Foreign Particulate Matter in Pulp by Transmitted Light (w/d)" in that it is the contrasting color of foreign matter rather than its opaqueness that affects the result.
- An automated procedure for dirt count can be found in TAPPI T 563 "Equivalent Black Area (EBA) and Count of Visible Dirt in Pulp, Paper, and Paperboard by Image Analysis." Both this procedure and T 563 are based on Equivalent Black Area (EBA) measurement.
Content Provider
Technical Association of the Pulp and Paper Industry [tappi]
