Pencil Hardness Tester by Sgm Lab Solutions

The pencil hardness tester, also referred to as the Wolff-Wilborn test, uses the varying hardness values of graphite pencils to evaluate a coating’s hardness. The Test Block is so designed to en..

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Product Description

The pencil hardness tester, also referred to as the Wolff-Wilborn test, uses the varying hardness values of graphite pencils to evaluate a coating’s hardness. The Test Block is so designed to ensure that the cylindrical pencil lead is maintained at a constant angle of 45° and exerts a force of 7.5N approx. The pencil lead, prepared beforehand using the special sharpener and abrasive paper, is provided with the instrument and pushed over the smooth, flat coated surface. The lowest hardness value of the pencil which marks the coating determines the coating’s hardness rating. The instrument is supplied complete with set of hardness pencils (14/17/19 pencils), positioning block(optional), x1 pencil sharpener, abrasive paper set, carry case and operating instructions can be used in accordance with ASTM D 3363, IS 101 (part 5), BS 3900-E19, ISO 15184 etc.


Model : PHT-M17 supplied complete with

  • Indian make Scratching tool of fixed pressure of 7.5N/750gms and 45 fixed angle
  • Mitsubishi’ Japan make Pencils in set of 17 pencils 6B to 9H.
  • Set of 17 Pencils includes – 6B, 5B, 4B, 3B, 2B, B, HB, F, H, 2H, 3H, 4H, 5H, 6H, 7H, 8H and 9H
  • 1 no. STAEDTLER German make sharpener
  • Set of Abrasive Paper


Operating Method:

  • The pencil are prepared by hand rubbing it on fine abrasive paper(400), The pencil is maintained at an angle of 45 Deg and pushed with uniform pressure onto the sample. leaving either a superficial trace or causing destruction down to the substrate.
  • Complies to: ASTM D 3363 and IS:101

 

Product Specification

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