QB 1131-1991
Regulations on the thickness of the gold covering layer of jewellery. (English Version)

Standard No.

QB 1131-1991

Language

Chinese, Available in English version

Release Date

1991

Published By

Professional Standard - Light Industry

Status

Be replaced 2006-05

Replace By

QB 1131-2005

Latest

QB 1131-2005

Scope

This standard specifies the technical requirements and markings for the thickness of the gold covering of jewelry products. This standard applies to jewelry products with non-gold base.

QB 1131-1991 history

• 2005 QB 1131-2005 Jewellery-the provision of gold coatings tickness
• 1991 QB 1131-1991 Regulations on the thickness of the gold covering layer of jewellery.