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ASTM D3363 Pencil Hardness Tester 500/750/1000g Weights, with 13 Pencils

4.7 (1) Write Review
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$124.99

$ 56 .99 $56.99

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About this item

  • 【Main Function】The hardness of coating film is a necessary index for quality identification in coating manufacturing and coating application (coating table) industry. Pencil scratch test for film hardness is a widely used test method in the world since 1980s.
  • 【Wide Application】It is applicable to film hardness test. The instrument is mechanical, three points contact the tested surface (two points are wheels and one point is pencil core). It always ensures that the tested film forms an included angle of 45 degrees, and pushes the instrument to move horizontally with force, so as to complete the test process and determine the resistance of the film to deformation.
  • 【Wide Application】This instrument is designed and manufactured in accordance with the manual operation method in Article 2 and 3 of the national standard "pencil test method for film hardness" GB6379-86. The instrument can be used in the laboratory, can also be applied to the construction site, and can identify the hardness of the film in any direction.


Product Description

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NOTE

In conducting the test, if the sharp edge of the lead is slightly chipped or crumbled, the lead must be resharpened.

  • Place the coated panel on a level, firm, horizontal surface. Starting with the hardest lead, hold the pencil or lead holder firmly with the lead against the film at a 45° angle (point away from the operator) and push away from the operator. Exert sufficient uniform pressure downward and forward either to cut or scratch the film or to crumble the edge of the lead. It is suggested that the length of the stroke be 1 ⁄ 4 in. (6.5 mm).
  • Repeat the process down the hardness scale until a pencil is found that will not cut through the film to the substrate(either metal or a previous coat) for a distance of at least 1 ⁄ 4 in. (6.5 mm) .

Glenn Gibbs
2025-01-14 13:55:05
I liked the product at first but found some dents and dings in the wheels. Not good for a test instrument, this did cause some inconsistent results but I had to use it due to the time pressure I was under.