The term “Opacity Chart”, as used in this catalog, refers to charts on which the test pattern is a simple combination of black and white areas, large enough for wide aperture reflectance instruments, as well as for visual opacity and color observations. Leneta opacity charts comply with all test methods specifying charts of such design. Such charts are sometimes refered to as “drawdown” or “hiding power” charts.
Form 2A is a black and white sealed opacity chart. The top is black and the bottom is white with overall dimensions of 5-1/2 x 10 in (140 x 254 mm).
The header includes a writable area for recording:
Date, Time Formula Batch Number Notes
A 1/4″ diameter hole is centered just under the top of the chart.