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Automatic Scratch Tester

Automatic Scratch Tester
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Product Code : Apan-BDG-520
Product Description

As an authorized dealer we are engaged in providing the broad assortment of Material Testing Equipment for various applicants.

Depending on the requirements, there are various methods for testing hardness. Some are dedicated to characterise coatings and others are more suitable for testing bulk materials such as metals, plastics, rubber or elastomers.

Scratch Resistance: To assess a coating’s resistance to scratch there are a number of different instruments that can be used: Pencil Hardness Tester (Wolff-Wilborn), Sclerometer, Clemen Apparatus, Scratching and Shearing /Scratch Instrument.

 

Coatings and paints can protect, decorate substrate or conceal the defects of substrate, and these three functions are related with coatings hardness. And hardness is the important performance for paint mechanical strength, as well as the important indicator to judge paint quality. One of important indicators to evaluate coatings hardness is scratch resistance.

ISO 1518 Paints and varnishes -- Determination of scratch resistancespecifies a test method for determining under defined conditions the resistance of a single coating or a multi-coat system of paint, varnish or related product to penetration by scratching with a scratch stylus loaded witha specified load. Penetration of the stylus is to the substrate, except in the case of a multi-coat system, in which case the stylus can penetrate either to the substrate or to an inter mediate coat.

Automatic scratch test principle is to put a single or composite metal test plate fixed on the instrument work platform, when testing, working plat pull test plate at a rate of 30 to 40 mm/s to move slowly, at the same time, loading a load of hemispherical scriber slowly move reverse lines in the coating surface, if the scriber cuts coating, the scriber and test plate will show conductive between plates. The results are evaluated at a certain load whether the needle cuts through coating or a needle does not cut through of maximum load.

This test has been found to be useful in comparing the scratch resistance of different coatings. It is most useful in providing relative ratings for a series of coated panels exhibiting significant differences in scratch resistance. 

§  Big working table can be moved left and right—convenient for measuring different areas in the same panel

§  Special fixing device for sample---can test different size substrate

§  Sound-light Alarm system for puncturing through sample panel---more visual

§  High hardness material stylus--more durable

 

 

Advance Model

Basic Model

Conform standards

ISO 1518-1

BS 3900E2

ISO 1518-2

Stylus

1) Having a hemispherical hard-metal tip of radius 0.25mm or 0.5mm

2) Having a hemispherical synthetic-ruby of radius 0.25mm or 0.5mm

Coned sapphire or diamond, the tip radius is 0.03mm

Angle between stylus and sample

90°

90°

Weight

Constant-loading
(0.5N×1pc
1N×1pc2N×2pcs5N×1pc10N×1pc

Variable-loading

0g50g or 0g100g or 0g200g

Motor

60W  220V  50HZ

Sytlus Moving Speed

35±5mm/s

10±2 mm/s

Working Distance

120mm

100mm

Max. Panel Size

200mm×100mm

Max. Panle Thickness

Less than 1mm

Less than 12mm

Overall Size

500×260×380mm

500×260×340mm

Net Weight

17 KG

17.5KG

  

Trade Information
  • Certifications
  • ISO 1518, ISO1518:2011, ISO 1518-1, ISO 1518-2, BS 3900:E2.

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