GB/T 4893.4-2013 (English Version) Test of surface coatings of furniture.Part 4:Determination of adhesion.Cross cut

Standard No.: GB/T 4893.4-2013
Language: Chinese, Available in English version
Release Date: 2013
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Status: Be replaced 2024-06
Replace By: GB/T 4893.4-2023
Latest: GB/T 4893.4-2023
Replace: GB/T 4893.4-1985

Scope: This part of GB/T 4893 is applicable to the determination of the adhesion of paint film on the surface of wooden parts in furniture. This standard specifies a test method for assessing the resistance of a paint film to release from a substrate when the paint film penetrates to the substrate using a rectangular grid pattern. The properties determined by this empirical test method depend on factors other than the adhesion of the paint film to the preceding paint film or substrate. Therefore, this test method cannot be regarded as a method for quantitatively measuring the adhesion value. The test method specified in this section can be used as a pass/fail test, or where appropriate, as a six-level classification test. When used in a multi-film system, it can be used to assess the resistance of each paint film in the paint film system to detachment from every other paint film. Although the test methods specified in this standard are applicable to paint films on hard substrates (steel) and soft substrates (wood and plastics), these different substrates require different test procedures (see Chapter 6). This test method is not applicable to paint films with a total thickness exceeding 250 µm, nor to uneven paint films.

GB/T 4893.4-2013 Referenced Document

GB/T 20777 Paints and varnishes Examination and preparation of samples for testing
GB/T 3186 Paints, varnishes and raw materials for paints and varnishes. Sampling
GB/T 4893.5 Test of surface coatings of furniture.Part 5:Determination of thickness

2023 GB/T 4893.4-2023
2013 GB/T 4893.4-2013 Test of surface coatings of furniture.Part 4:Determination of adhesion.Cross cut
1985 GB/T 4893.4-1985 Furniture--Assessment of adhesion of surface coatings--Cross cut