It is used in measuring the pliability of the paint film through the capacity that the paint film deforms with the bottom material and does not get damaged at the specified standard conditions. It is expressed with the minimum shaft stick diameter which does not cause the paint film to crack when the test plate moves around the shaft stick of 180 degree within 1-3 seconds at the specific conditions in the standard .

Standard : ISO1519   ASTMD522  DIN5352

Technical Parameter:

The diameter of the shaft stick  : 4，5，10，15 mm

Thickness of bottom material for the test plate :0.2-0.3 mm