该方法（1,2）适用于根据等效黑面积对纸浆和再生纸浆中的污垢进行数值估算。结果将不同于通过透射光（现已撤回）通过TAPPI T 246纸浆中的异物颗粒物获得的结果，因为影响结果的是异物的对比色，而不是其不透明性。可在TAPPI T 563等效黑色区域（EBA）中找到污垢计数的自动化程序，并通过图像分析对纸浆、纸张和纸板中的可见污垢进行计数。本程序和T 563均基于等效黑面积（EBA）测量。

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results will differ from those obtained by TAPPI T 246 Foreign Particulate Matter in Pulp by Transmitted Light (now withdrawn) in that it is the contrasting color of foreign matter rather than its opaqueness that affects the result.An automated procedure for dirt count can be found in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.