BS EN ISO 1518-1:2011
Paints and varnishes. Determination of scratch resistance. Constant-loading method
This part of BS EN ISO 1518 specifies 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 with a 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 intermediate coat.
The method specified can be carried out
a) either as a “pass/fail” test, by testing with a single specified load applied to the stylus to assess compliance with a particular specification
b) or by applying increasing loads to the stylus to determine the minimum load at which the coating is penetrated.
What are the main changes I need to know about for this standard?
- A principle clause has been added
- Two versions of the test apparatus are now described
- The minimum length of the scratch has been reduced from 60mm to 40mm
- The magnification of the lens used to examine the scratch has been specified as at least x4
- The supplementary test conditions have been integrated in the test report
- A clause on precision has been added
ISO 1518 consists of the following parts, under the general title Paints and varnishes. Determination of scratch resistance:
- Part 1: Constant-loading method
- Part 2: Variable-loading method
Contents of BS EN ISO 1518-1 include:
- Scope
- Normative references
- Principle
- Apparatus
- Sampling
- Test panels
- Procedure
- Precision
- Test report
- Bibliography
It cancels and replaces ISO 1518:1992, which has been technically revised.
What other standards should I consider for paints and varnishes?
BS 4800:2011 Schedule of paint colours for building purposes
