Automatic Scratch Tester - ISO 1518-1
Product Code: BGD 520-1
Application
ISO 1518 "Paints and varnishes — Determination of scratch resistance" specifies a test method to determine the resistance of a single coating or a multi-layer system of paint, varnish or related product to scratching under defined conditions, using a scratch stylus loaded with a specified load. The penetration of the stylus is through to the substrate, except in the case of a multi-layer system; in this case, the stylus may penetrate to both the undercoat and the intermediate coat.
This test has proven useful for comparing the scratch resistance of different coatings. It is most useful in providing relative ratings for a series of coated panels showing significant differences in scratch resistance.
Prior to 2011, there was a single standard used to evaluate paint scratch resistance; it was opposed to the scientific evaluation of the scratch resistance of paints in different applications. After this standard was revised in 2011, this test method was divided into two parts: One is constant loading; that is, the loading on the panels is constant during the scratch test, and the test results are expressed as the maximum weights that do not damage the coatings. The other is variable loading; that is, the loading applied to the stylus is continuously increased from 0 along the test panel, and when the paint begins to scratch, the distance from the starting point to the other point is measured. The test results are expressed as critical loads.
Standard
- ISO 1518-1
- BS 3900:E2
Features
- The large worktable can be moved left and right to measure different areas on the same panel (maximum test plate size 200mm×100mm)
- Special fixing device for the sample can test substrates of different sizes
- Sound and light alarm system makes piercing of the sample panel more visual
- High hardness material stylus
Technical Parameters
| Complies with standards | ISO 1518-1, BS 3900:E2 |
| Standard scratching needle | Hemispherical hard metal needle tip with a radius of (0.50±0.01) mm |
| Angle between the scratching tool and the test plate | 90° |
| Test load | Constant load (0.5 N/1 unit, 1 N/1 unit, 2 N/2 units, 5 N/1 unit, 10 N/1 unit) |
| Motor | 30 W 220 V 50 Hz |
| Scratching speed | (35±5) mm/s |
| Travel distance | 120 mm |
| Maximum size of the test specimen | 200 mm x 100 mm |
| Maximum thickness of the test specimen | Less than 1 mm |
| Device dimensions | 560 mm x 270 mm x 380 mm (W x D x H) |
| Net weight of the device | 17 kg |
