GB/T 42945-2023 "Pulps—Determination of mass fraction of fines" is applicable to all types of pulp and paper that can be completely disintegrated into fibers. It specifies the method for determining the mass fraction of fines by using perforated metal plates or single-layer fiber fractionating screens, where fines refer to the portion that can pass through a metal screen with a nominal aperture size of 76μm. The standard outlines the steps of sample disintegration, screening, drying, and weighing, with results calculated as a percentage of oven-dry mass. For samples containing inorganic mineral fillers, the relevant components must be included.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
| Status | Active | ||
|---|---|---|---|
| CCS | Y30 | ICS | 85.040 |
| Release Date | 2023-08-06 00:00:00 | Implementation Date | 2024-03-01 00:00:00 |