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Scuff Tester / PATRA Rub Tester

This equipment is intended to evaluate the Rub Proofness of prints on paper or board. It can also be used to measure / evaluate Colour Transfer from printed / coated surface during rubbing. The application can be extended for measurement of abrasion resistance of some Plastic materials / Aluminum Foils.


In this machine, 2 samples of the same substrate are rubbed against each other in the same plane, under a constant pressure of 2 p.s.i and at a fixed speed of 60 RPM. The number of rubs are recorded using a non-contact type digital counter.


  • This machine works as a great comparator of the variations in print quality between various batchesor various suppliers
  • Higher Rub Resistance = better print quality.
  • Lower Rub Resistance = poor print quality.

Design specifics

  • The highest degree of parallelity of disc samples.
  • Accurate R.P.M. of rotating disks assured by High torque Step Synchronous motors
  • Very Low power consumption (Less than 100w).
  • No Gearbox. Hence, No Maintenance.
  • Compact but Sturdy Design.
  • Very Low Noise Level.
  • User – Friendly Electronic Controls.
  • Non – Contact Type Sensor for Rub Counter makes it maintenance free.

Models available

  • DX2 Model : with Rubbing Pressure fixed @ 2 psi
  • HX2¬†Model : with adjustable Rubbing Pressure of 2, 2.5, 3.5 and 4 psi using removable weights.

Both models come with :

  • Digital Rub Counter,
  • Digital Revolution Counter (RPM) and
  • Autostop facility (Preset)

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