Vinatoru GFT392 Gelbo Flex Durability Tester

Complies with ASTM test method F392. Determines flex resistance of flexible barrier materials by applying repetitive strain. Pinhole formations are criteria for measuring failure, determined using colored turpentine staining through pinholes onto white backing. Flexing combines twisting and horizontal motion at 45 cycles per minute. 5 test conditions from 20 to 2700 cycles. Sample size 8"x11" (200 x 280 mm).