Transparent chart for the estimation of defect, Test Method TAPPI/ANSI T 564 sp-21
1. The transparent chart developed for this method may be used to estimate the size (area) of spots, defects, and/or other inclusions over the range of 0.02 to 5.00 mm2. The measurements provided on the chart correspond to the dots only. Rectangles on the chart can be used for visual comparison, however they are not measured.
2. The chart may be used in a large number of applications where there is a need to estimate a size (area) by way of a direct comparison to a known area disk or rectangle. Applications may include, but are not limited to, the measurement of visible ink spatter on printed surfaces, the estimation of the growth rate of bio-colonies, air inclusions in transparent plastic castings and films, etc.
3. The chart must not be used to estimate the equivalent black area (EBA) of dirt or other colored specks.Dirt measurements by the EBA method should be performed in accordance with TAPPI T 437 “Dirt in Paper and Paperboard,” TAPPI T 213 “Dirt in Pulp,” or TAPPI T 563 “Equivalent Black Area (EBA) and Count of Visible Dirt in Pulp, Paper, and Paperboard by Image Analysis.”Do not use this chart for T 437, T 213, or T 563.
This test method was developed for use with the Transparent Size Estimation Chart and Calibrated Size Estimation Chart sold separately.
Contact press@tappi.org with questions regarding TAPPI Charts.
There are no refunds for the purchase of this digital download.
This is a pdf download of the test method. The actual chart(s) are purchased separately.