Introduction: The tester is designed according to iso 1974(paper--tearing strength test method), gb455.1, it is mainly used for paper tearing strength test as well as cardboard low-tearing strength test. It can test automatically, lcd displays data. The tester is incorporated with mechanize and electrization. Its micro-control system adapts to the high precision photoelectric axial coder and micro-control digital circuit which make the man-machine conversation come true. The advantages: advanced technology, complete functions, steady capability, simple operation, etc. Technical parameter: 1. Range: 10mn~1000mn 2. Tearing arm: 104fa1 (mm) 3. Beginning angle for tearing: 27.5ffa0.5f 4. Beginning cutting length of specimen: 20fa0.5 (mm) 5. Dimension: 450 (l)f¯310 (w)f¯465 (h) (mm) 6. Weight: about 15kg Plywood carton