GB/T 5432-2026Test method for the density of glass — Buoyancy method (English PDF)

3 Terms and definitions

4 Principle

5 Reagents and materials

6 Apparatus and equipment

7 Test specimens

8 Temperature

9 Test procedure

10 Calculation

11 Test report

12 Quality assurance and measures

Foreword

This document was issued on 2 July 2026 by the State Administration for Market Regulation and the Standardization Administration of the People's Republic of China, and takes effect on 1 February 2027.

It replaces GB/T 5432-2008, which remains in force until that date.

The document is under the responsibility of the China National Light Industry Council.

Classification: ICS 81.040.30, CCS Y 22.

3 Classification and status

GB/T 5432-2026 is classified under ICS 81.040.30, in the field of glass and ceramics industries. ICS is the International Classification for Standards, the same scheme used by ISO and by the national bodies of most countries, which is what allows a Chinese standard to be placed beside its foreign counterparts on subject rather than on number.

Its Chinese Standard Classification code is CCS Y 22. CCS is the domestic scheme, a letter for the sector and two digits for the subject within it, and it is the code by which the standard is filed and searched in China.

The GB/T prefix marks a recommended national standard. It is not, in itself, law: it becomes binding when a contract names it, when a regulation or a mandatory standard refers to it, or when a producer declares conformity with it. In practice that covers most of the cases in which it will be read — a purchase specification, an inspection agreement or a certification scheme.

The document is under the responsibility of the China National Light Industry Council, which is the body that maintains it and that will answer a formal question about its interpretation.