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All Categories > Scrub Resistance Test Panel and Accessories > Leneta Calibration Scrub Test Panels > P121-C  
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Form P121-C Leneta Calibration Scrub Test Panels

These are standard panels prepared by applying white emulsion paints on black scrub test panels. The films are indefinitely stable and the panels of each type essentially identical. They are used as controls in the measurement of scrub resistance, to obtain Calibration Ratings that normalize the wide variations often encountered for undefined reasons, among laboratories using the same scrub method. The Calibration Rating is the performance of the test paint panel expressed as a percentage relative to that of the selected Calibration Panel. Thus:

% Calibration Rating = Test Panel Cycles-to Failure/Calibration Panel Cycles-to-Failure x 100

The letter indicating the calibration panel type is appended to the calibration rating, e.g. 125A, 65C, 95D etc.
The figure to the left illustrates simultaneous side-by-side scrubbing of half-panels to maximize correlation, analogous to ASTM D 2486, Method B.
Note: ASTM D 4213 "Weight Loss Method" whereby:

Calibration Rating = Calibration Panel Weight Loss/Test Panel Weight Loss x 100


Scrub Resistance


Cycles to Failure1


Quantity per Box


Boxes per Case


International Standards

ASTM D 2486
1 Typical Values per ASTM D2486, Method A

 Related Leneta Items for P121-A, P121-C 

Leneta-ASTM Scrub Media (SC-2)
SC-2 Leneta-ASTM Scrub Media

Fig. 1 Typical Failure Using Shim per D2486, Method A
Form P121-10N Leneta Scrub Test Panels

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