Hoffman Scratch Hardness Tester
Article No. 1610
Hoffman Scratch Tester
Adhesion tester for scratch and mar resistance
Features
The Hoffman Scratch Hardness Tester was developed for the comparative evaluation of scratch resistance and adhesion of many types of coatings.
- Small size for in the field or plant testing
- Flexible design – can apply more than 2400 gram force
- Easy to use and operate
Technical Attributes
-
- Weight
- 0.7 kg
-
- Weight
- 1.5 lb
-
- Dimensions: L x W x H
- 28 x 2.5 x 3.8 cm
-
- Dimensions: L x W x H
- 11 x 1 x 1.5 in
General
Procedure
To operate, attach riders to the scale arm at the numbered positions. The carriage is held down firmly by hand and moved in the opposite direction, to cause a trailing scratch. The large standard rider loads 100 g per division, while the small rider loads 25 g per division. This small rider may be used for making low-range measurements involving small increments of pressure, or it may serve as a vernier with the large rider in making more precise medium-range measurements.
Scratch Hardness
The force necessary to cut through the film to the substrate.
Adhesion
The force required to scrape a path through the film, when the stylus begins its motion on an uncoated portion of the panel.
Delivery Content
Tester
Large Rider (1612)
Small Rider (1613)
Scratching tool (1611)
Manual
Carrying case
Large Rider (1612)
Small Rider (1613)
Scratching tool (1611)
Manual
Carrying case
Knowledge
Adhesion
Adhesion is of utmost importance for surface coatings to guarantee effective corrosion protection and resistance to physical damage. In practice, various testing methods are used to evaluate adhesion properties.
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