The hardness of paper rolls is an important quality factor in the working processes of the paper, film and foil industry. Rolls that are too hard, or too soft, rolls that are unevenly wound, or rolls with different moisture contents can cause difficulties during the printing process. The hardness control of such rolls, in particular their uniformity over the whole width, has to date created many problems.
The PAROTESTER 2 Roll Hardness Tester allows for an objective and quick evaluation of the roll hardness, the hardness profile and the variation in hardness of paper, foil and film rolls. Automatic loading and unloading of the impact body by pressing the impact device to the roll results in fast and repeatable tests with more resolution than the commonly used ORIGINAL SCHMIDT hammer test. The PAROTESTER 2 Impact Devices are also designed for long service life, unlike the Schmidt Hammers that need to be re-calibrated after every 1,000 impacts.
User-friendly electronics with a large LCD display of the measuring data with statistical values adds to the benefits of the PAROTESTER 2 Roll Hardness Tester. Data can be printed out immediately on the optional RS-232 printer. Information (~5'000 single measurements) can also be stored internally by individual roll identification and can be sent to a PC or printed via the RS-232 connection.
Non Destructive Testing Instruments for Paper Industry 
