the People's Republic of China national standards

颗粒紫胶(Seed lac—Specification) GB 8137-1987

This standard is applicable to the control of the quality index of granular lac.

This standard is proposed with reference to the international standard ISO 55-1977 Granular Shellac.

1 Definition

Particulate lac refers to the product processed by crushing, screening, washing and drying of lac gum. Raw materials for processing shellac products.

2 Technical requirements

The indexes of granular lac at all levels shall meet the requirements in the table below.

3 Packaging, transportation and storage

3.1 packaging

Packed in sacks, lined with a layer of fine cotton cloth, each bag weighs 50~75kg. The sack is printed with the words of manufacturer, product name, date of production, sun protection and moisture protection. Each bag must be placed with inspection index certificate.

3.2 transportation

The product must be covered during transportation, sun and rain are strictly prohibited, and placed away from heat and humidity.

3.3 storage

It must be placed in a dry, ventilated and cool room and must be turned over frequently to avoid caking.

4 Product inspection

The inspection of various technical indicators shall be carried out in accordance with the GB8143-87 Inspection Method for Shellac Products. If one of the indicators fails, it will be regarded as a nonconforming product of that level.

Additional Notes:

This standard is under the centralized management of the Institute of Forest Products Chemical Industry, Chinese Academy of Forestry.

This standard was drafted by the Institute of Forest Chemical Industry, Chinese Academy of Forestry.

The main draftsmen of this standard are Wu Tongfang, Ma Wanqing and Wei Chaoguan.