TAPPI T456 Test Fixture | GTAPT456-779

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TAPPI T456 Test Fixture | GTAPT456-779


Model #
Max Force Capacity
500 N (112 lbf)
Fixture Adapter
Af159 (15.9 mm or 5/8 in) with 8 mm crosspin; Other adapters available upon request.
GTAPT456-779 test fixture meets TAPPI T456 requirements for Finch wet strength tests. The finch wet strength fixture is a wet strength device consisting of an inverted stirrup about 38 mm (1.5 in.) wide and 76 mm (3 in.) long, made of metal straps by which a horizontal rod, about 28 mm (1.1 in.) in length and 5 ± 0.05 mm (0.188 ± 0.002 in.) in diameter, is supported. Between the straps and under the horizontal rod is a small, vertically movable container for holding water or other liquid. When the liquid container is locked in its uppermost position, the horizontal rod is immersed in the liquid to a depth of at least 19 mm (0.75 in.). A thin metal tang forming the lower part of the inverted stirrup permits it to be fastened in the lower clamp of a universal test machine. Tappi T456 is used for Wet tensile strength tests of papers and paperboard (excluding corrugated board) that are subjected to stress while wet, either during processing or use. Such materials include but are not limited to papers used in map-making, photography, and blue prints, bags and food wraps.


  • File Description
    File Size
    File Type
  • GTAPT456-779
    334 KB