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GB/T 13505-2025High purity insulating wood pulp (English PDF)

高纯度绝缘木浆

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 2, 2025

Implementation date

July 1, 2026

Scope

GB/T 13505-2025 is the English-translated version of 高纯度绝缘木浆.

GB/T 13505-2025 is the Chinese standard "High purity insulating wood pulp". Its scope clause reads: This document specifies the requirements, inspection rules, marking, packaging, transportation, and storage of high-purity insulating wood pulp, and describes the corresponding test methods.

The law provides information on classification. This document applies to the production, inspection, and sale of high-purity insulating wood pulp. Its clauses include terms and definitions.

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Document preview — GB/T 13505-2025

National Standard of the People's Republic of China

ICS: 85.040
Classification: Y 31
Replacing: GB/T 13505-2007

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
5.1) and test methods (see 6.9, 6.12, 6.13, 6.15 and 6.16);
4.1) and test methods (see 5.6, 5.10 and 5.12 in the.2007 edition);

1 Scope

This document specifies the requirements, inspection rules, marking, packaging, transportation, and storage of high-purity insulating wood pulp, and describes the corresponding test methods.

The law provides information on classification.

This document applies to the production, inspection, and sale of high-purity insulating wood pulp.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 451.1 Determination of dimensions and skewness of paper and paperboard

GB/T 462 Determination of moisture content in analytical samples of paper, paperboard and pulp

GB/T 740 Sampling of Pulp Samples

GB/T 742 Determination of ash content (on-ignition residues) in papermaking raw materials, pulp, paper and paperboard (575°C and 900°C)

GB/T 1545-2008 Determination of acidity or alkalinity of extracts from paper, paperboard and pulp

GB/T 1546 Determination of kappa number in pulp

GB/T 1548 Determination of intrinsic viscosity in copper ethylenediamine (CED) solution for pulp

GB/T 2678.2-2021 Determination of water-soluble chlorides in paper, paperboard and pulp

GB/T 2678.6-2023 Determination of water-soluble sulfates in paper, paperboard and pulp

GB/T 2828.1 Sampling Procedures for Inspection by Attributes - Part 1.Sampling Schemes Retrieved by Acceptable Quality Limit (AQL) for Lot-by-Lot Inspection

GB/T 3332 Determination of pulp freeness (Schober-Regler method)

GB/T 7974 Determination of blue light diffuse reflectance factor D65 luminance of paper, paperboard and pulp (diffuse/vertical method, outdoor daylight conditions)

GB/T 7977-2007 Determination of conductivity of paper, paperboard and pulp water extract

GB/T 8940.2 Preparation of pulp brightness (whiteness) test samples

GB/T 10740 Determination of pulp dust and fiber bundles

GB/T 22902 Determination of acetone-soluble matter in pulp

GB/T 24323 Determination of Physical Properties of Laboratory Paper from Pulp

GB/T 24324 Preparation of laboratory paper for physical testing of pulp - Conventional paper forming apparatus method

GB/T 24325 Laboratory pulping - Valley beater method

GB/T 24326 Preparation of laboratory paper for physical testing of pulp - Rapid Kaiser process

GB/T 29287 Laboratory Pulping (PFI) Method

GB/T 40272 Determination of acid-soluble magnesium, calcium, manganese, iron, copper, sodium and potassium in paper, paperboard, pulp and cellulose nanomaterials

3 Terms and Definitions

This document does not contain any terms or definitions that need to be defined. […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

Editions of GB/T 13505

Edition	Title	Revision	Status
GB/T 13505-2025	Pure insulating pulp	current edition	Current
GB/T 13505-2007	Pure insulating pulp	previous edition	In force
GB/T 13505-1992	Pure insulating pulp	previous edition	Obsolete

This page sells the current edition, GB/T 13505-2025. Earlier editions are listed for reference only.

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