ISO 2409-2020pdf download.Paints and varnishes一Cross-cut test.
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1513, Paints and varnishes — Examination and preparation of test samples
ISO 2808, Paints and varnishes — Determination offilm thickness
ISO 4618, Paints and varnishes — Terms and definitions
ISO 13076, Paints and varnishes — Lighting and procedure for visual assessments of coatings
ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4618 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:/jwww.isoorg/obp
— IEC Electropedia: available at http://www.electropedia.org/
4 Principle
Six parallel cuts are introduced in the coating and another six cuts are introduced perpendicular to the first cuts. Any loose paint particles are removed. The Cut area is examined visually and compared to a six-step classification.
5 Apparatus
5.1 General
Use ordinary laboratory apparatus, together with the apparatus specified in 5.2 to 5.4.
5.2 Cutting tool
5.2.1 General requirements
It Is particularly Important to ensure that the cutting tool is capable of creating the specified V-shape throughout the total coating thickness, and that the cutting edges are in good condition. Suitable tools are described in £2.2 and £2.3 and shown in Figures 1 and 2.
A single-blade cutting tool (5.22) as well as the multi-blade cutting tool (52.3) are suitable for all coatings and substrates; it shall be ensured that all cuts mark or scratch the substrate. The depth of indentation into the substrate shall be as low as possible, however.
The tools described in £22 and 5.2 are suitable for manual use, which is the more usual method of use, hut the tools may also be mounted on a motor-driven apparatus, which gives more uniform cutting. The application of the latter procedure shall be subject to agreement between the interested parties.
The apparatus (manual or motor-driven) and the type of cutting tool used have an influence on the test result. Results obtained with different types of cutting tool cannot be directly compared. For each test series, the same cutting tool shall be used.
5.2.2 Single-blade cutting tools
5.2.2.1 Hand-held single-blade cutting tool with a cutting edge as shown in Figu.rel. a).
5.2.2.2 Single-blade cutting tool used in motor-driven apparatus as shown in Figur3.
5.2.2.3 Cutter with a rigid blade with a V-shaped cutting edge as shown in Figure 1 b).
The specific thickness of the blade is not specified, as long as the blade is rigid and the cut produced is V-shaped through the whole thickness of the coating.
NOTE The cutter blade is designed to be broken in a defined manner so that a sharp blade is available at any time.ISO 2409 pdf download.
Tags: Paints and varnishes
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