GB/T 6739-2022 Active
GB/T 6739-2022 Paints and varnishes—Determination of film hardness by pencil test
Abstract
This document specifies a method for determining the hardness of paint films by pushing a pencil of known hardness onto the paint film.
This document is applicable to the determination of the hardness of single-layer paint films of color paints, varnishes, and related products, as well as the hardness of the top layer of multi-layer paint films.
This document is not applicable to comparing the pencil hardness of different paint films. This document is suitable for providing a relative grading for a series of painted test panels with significant differences in pencil hardness.
This document is only applicable to the determination of the hardness of paint films on smooth surfaces.
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Active |
| Standard Code | GB/T 6739-2022 |
| CCS | Paints, pigments, and dyes |
| ICS | Paints and varnishes |
| Implement Date | 2023-07-01 |