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Home  >>  Products  >>  Hardness  >>  Pendulum Hardness Tester
Pendulum Hardness Tester

Test method in accordance with: ASTM D4366, DIN 53 157, ISO 1522, SNV 37 112, NFT 30 016.

Evaluation of the hardness of paints and related coatings in accordance with standards. The procedure as per König is based on the measurement of the damping of a pendulum oscillating on the paint film. The application of this procedure is subject to the following conditions: Pendulum Hardness Tester
  • Substrate must not deform or vibrate under load of pendulum
  • Film thickness of at least 30μm (1.2 mils) to minimize substrate influences
  • Paint films to be compared must not deviate more than 10% in their film thicknesses
  • Surface of coating must be smooth and free of disturbances. Coarse pigment agglomerations, poor leveling properties, dust, etc. cause false measurements.



PRINCIPLE TECHNICAL DATA PRICE LIST
 

 

Principle

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The principle of the pendulum hardness test is based on the fact that the amplitude of oscillations of a pendulum resting on a sample decreases more rapidly the softer the films. The time in seconds (damping time) for the pendulum deflection to slow down to a specific value is taken as the hardness of the coating. The test methods are standardized as per König and Persoz.

The plate consists of precision grooves which are inked with a hand-drawn scraper. In this way the ink film is laid down and cleaned up quickly. The thickness of the ink film is controlled at known levels and variables of roller distribution are eliminated. The Wedge Printing Plate can be designed to produce either variable or uniform film thickness. The variable models produce a continuous range of film thickness in a single impression. Whereas the uniform film thickness plate is used when testing for a large print area, a multi-path uniform model allows several different levels of uniform film thickness to be proofed simultaneously. Strict attention to printing speed and/or pressure is essential only when press testing for mottle, printing smoothness or pick resistance. Although proof press testing with the Wedge Plate is restricted to solids, its ease and speed of operation make it a valuable routine control tool.

It should be noted that the NPIRI-A is the same in range and calibration as the Number G-1 NPIRI Production Grindometer and can also be used to check grind and dispersions.

 

Technical Data

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Technical Data
Specifications König Persoz
Weight: 200g ±0.2 König 500g ±0.1 Persoz
Ball Diameter: 5mm/0.2 in. 8mm/0.3 in.
Deflection Start: 12°
End:
Period of Oscillation (1 Oscillation): 1.4 s 1 s
Damping Time: 250 x ±10 s 430 s ±10 s

 

Components

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Base unit with protective cover, cable release, glass plate, spirit level, mains cable and screw driver König pendulum - Cat. No. HA-5856

 

Prices

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Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices
HA-5854 Pendulum Hardness Tester König with digital counter, LED indication, protective cover third light barrier with switch for quick change of measuring method, acoustic signal at end of test, and switch for choice of values oscillation or seconds $3,975.00
HA-5855 Pendulum Hardness Tester Persoz with digital counter, LED indication, protective cover third light barrier with switch for quick change of measuring method, acoustic signal at end of test, and switch for choice of values oscillation or seconds 3,975.00
HA-5856 König Pendulum, optional (Specify current) 714.00
HA-5857 Persoz Pendulum (Specify Current) 714.00
HA-5860 Cable Release 38.00



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