GB/T 13507-1992 "Unbleached Sulfite Wood Pulp" specifies the technical requirements, test methods, inspection rules, as well as the marking, packaging, transportation, and storage of unbleached sulfite wood pulp. It classifies unbleached sulfite softwood pulp into three grades: A - A, A - B, and A - C, and sets standards for indicators such as fiber morphology, brightness, dirt count, tensile index, etc. The standard also clarifies sampling and testing methods to ensure product quality and standardized trade handover.
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 | Y31 | ICS | 85.040 |
| Release Date | 1992-06-23 00:00:00 | Implementation Date | 1993-03-01 00:00:00 |
