ISO 12137:2011 PDF

Paints and varnishes — Determination of mar resistance

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Title (English):

ISO 12137:2011

Paints and varnishes — Determination of mar resistance

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 7
Publication date:: October 6, 2011
Edition:: ISO IS 12137 edition 1 version 1
ICS:: 87.040

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Description (English):

ISO 12137:2011 specifies a method for determining, using a curved (loop-shaped or ring-shaped) stylus, the mar resistance of a single coating of a paint, varnish or related product, or the upper layer of a multicoat system. This test has been found to be useful in comparing the mar resistance of different coatings. It is most useful in providing relative ratings for a series of coated panels exhibiting significant differences in mar resistance. ISO 12137 does not specify a method using a pointed stylus, two of which are specified in ISO 1528‑1 and ISO 1528‑2, respectively. The choice between the three methods will depend on the particular practical problem.

Technical details

Technical committee: ISO/TC 35/SC 9 - General test methods for paints and varnishes
SKU: ISO 12137:2011

Abstract

Overview

ISO 12137:2011 - Paints and varnishes - Determination of mar resistance - defines a laboratory test method to assess the mar resistance of a single coating or the upper layer of a multicoat system using a curved (loop-shaped or ring-shaped) stylus. The standard is intended for comparative testing and provides relative ratings for coatings that show significant differences in susceptibility to mar. It complements, but does not replace, pointed-stylus methods described in ISO 1518‑1 and ISO 1518‑2.

Key Topics and Requirements

Test principle: A loop- or ring-shaped stylus mounted at a 45° angle is pressed onto a coated test panel while the panel is moved beneath the stylus. Load is increased in steps until marring occurs.
Instrument and stylus:
- Balanced-beam mar-resistance instrument with capacity up to 5 kg and step resolution typically 0.5 kg (0.25 kg or 0.1 kg allowed for higher accuracy).
- Loop stylus: chromium-plated steel, 1.6 mm rod bent into U-shape, outside radius (3.25 ± 0.05) mm, hardened to Rockwell HRC56–58, surface roughness

Related standards

Mentioned in the description and other ISO standards

Overview

Key Topics and Requirements

Test principle: A loop- or ring-shaped stylus mounted at a 45° angle is pressed onto a coated test panel while the panel is moved beneath the stylus. Load is increased in steps until marring occurs.
Instrument and stylus:
- Balanced-beam mar-resistance instrument with capacity up to 5 kg and step resolution typically 0.5 kg (0.25 kg or 0.1 kg allowed for higher accuracy).
- Loop stylus: chromium-plated steel, 1.6 mm rod bent into U-shape, outside radius (3.25 ± 0.05) mm, hardened to Rockwell HRC56–58, surface roughness

ISO 12137:2011 PDF

Technical details

Abstract

Overview

Key Topics and Requirements

Related standards

Abstract

Overview

Key Topics and Requirements

Related standards

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