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Bursting Strength Tester for Paper

Bursting strength is widely used as a measure of resistance to rupture in many kinds of paper. The test is
relatively easy and inexpensive to make and appears to simulate some end use requirements.

Bursting strength of a material is defined as the maximum hydrostatic pressure required to produce rupture of the
material when a controlled and constantly increasing pressure is applied through a rubber diaphragm to a circular area, 30.5 mm (1.20 in.) diameter. The area of the material under test is initially flat and held rigidly at the circumference but is free to bulge during the test.

The test specimen, held between annular clamps, is subjected to an increasing pressure by a rubber diaphragm,
which is expanded by hydraulic pressure at a controlled rate, until the test specimen ruptures. The maximum pressure reading up to the rupture point is recorded as the bursting strength.

This method is designed to measure the maximum bursting strength of paper and paper products having a bursting strength of 50 kPa up to 1200 kPa (0.5 – 12.0 kg/cm2) and in the form of flat sheets of up to 0.6 mm (0.025 in.) thick.

It is not intended for use in testing corrugated, fiberboard, linerboard, or hardboards that tend to cut the thin rubber diaphragm of the bursting tester.

Tech Specs

Bursting Strength Tester.                    Model # 403DM

Standard Digital Model

Motorized, Desktop, Digital model.

With Backlit LCD Display.

With manual clamping of sample using hand wheel clamp.

Microprocessor based model Logical Detection of Sample Failure

With Auto-Stop & Auto-Return on Sample Failure

Pacmachine 94’ Award winner.

Suitable for : Paper only (up to 0.6 mm Thickness).

Confirming to TAPPI Standards (T–403).


Range :                        0 – 6 Kg/cm2.

Least Count :               0.01 Kg/cm2



  • Spare Diaphragms (Consumable)
  • C-Spanner (to open the diaphragm clamp nut)
  • 4-20 mA MACS Calibrator (Milli-Ampere Calibration Source / Current Loop Calibrator) For use with the above BS Tester.


Other Models also available : 

Auto-Clamping Models

  • 403DA

Printer Port Models

  • 403DMP / 403DAP

Computerised Models

  • 403DMDX / 403DADX


Utilities Required (To be supplied by the buyer) :

  • Power Supply : 230 Volts AC at 50 Hz. (Fluctuation Free Power required)


IQOQ Documentation Set available for Pharmaceutical companies

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