A roll hardness tester is a device to measure the roll hardness, hardness profile and hardness variation of paper rolls. == Method == In the preparation phase, the plunger, guide bar and guide disk are pushed forward by the compression spring.
A roll hardness tester is a device to measure the roll hardness, hardness profile and hardness variation of paper rolls. == Method == In the preparation phase, the plunger, guide bar and guide disk are pushed forward by the compression spring.
Source: Wikipedia "Roll hardness tester" · CC BY-SA 4.0
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