GB/T 8140-2009Bleeched shellac (English PDF)
漂白紫胶
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
May 12, 2009
Implementation date
November 1, 2009
Scope
GB/T 8140-2009 is the English-translated version of 漂白紫胶.
GB/T 8140-2009 is the Chinese standard "Bleached shellac". Its scope clause reads: This Standard specifies the technical requirements, sampling, test methods, inspection rules, as well as marking, packaging, storage and transportation of bleached shellac.
This Standard applies to light-colored shellac products obtained by chemical bleaching of shellac resin. Its clauses include terms and definitions; technical requirements; sampling; test methods; inspection rules; marking, packaging, storage and transportation.
It was issued by the General Administration of Quality Supervision, Inspection and Quarantine on MAY 12, 2009 and took effect on NOVEMBER 1, 2009.
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Document preview — GB/T 8140-2009
National Standard of the People's Republic of China
- ICS
- 65.020
- Classification
- B 72
- Replacing
- GB/T 8140-1987
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword3
- 1 Scope4
- 2 Normative References4
- 3 Terms and Definitions4
- 4 Technical Requirements5
- 5 Sampling5
- 6 Test Methods5
- 7 Inspection Rules7
- 8 Marking, Packaging, Storage and Transportation8
Foreword
This Standard was replaced by GB/T 8140-1987 Bleached Lac.
Compared with GB/T 8140-1987, the major changes of this Standard are as follows.
--- Add the Normative References;
--- Delete the requirements of mandatory test, optional test and note in technical requirements;
--- Adde four indicators and requirements of heat hardening time (thermal life), lead, arsenic and rosin;
--- Delete inorganic acid, and two indicators of free chlorine and peroxide;
--- Adjust the requirements of color index, hot ethanol insoluble matter, volatile matter (moisture), chlorine content, acid value and other indicators;
--- Add the Clause 5 "Sampling";
--- Add the provisions of inspection classification and inspection items in the inspection rules;
--- Add the requirements of ambient temperature for storage and transportation.
1 Scope
This Standard specifies the technical requirements, sampling, test methods, inspection rules, as well as marking, packaging, storage and transportation of bleached shellac.
This Standard applies to light-colored shellac products obtained by chemical bleaching of shellac resin.
2 Normative References
The provisions in following documents become the provisions of this Standard through reference in this Standard. For dated references, the subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard, however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies.
GB/T 5009.11 Determination of total arsenic and abio-arsenic in food
GB/T 5009.12 Determination of lead in foods
GB/T 8142-2008 Methods of sampling lac products
GB/T 8143-2008 Test methods of lac products
3 Terms and Definitions
For the purposes of this Standard, the following terms and definitions apply.
3.1 Bleached shellac
Use original shellac or granular shellac as raw material; dissolve it in sodium carbonate solution or other weak alkaline solution; remove impurities or shellac wax; and bleach it with bleach to make light-colored shellac.
3.2 Bleached lac
The bleached shellac that contains wax.
7 Inspection Rules
7.1 Classification of inspection
The product inspection is divided into exit-factory inspection and type inspection.
7.2 Inspection items
7.2.1 Exit-factory inspection. color indicator, hot ethanol insoluble matter, volatile matter (moisture), waxy, and chlorine content.
7.2.3 Type inspection shall be carried out in any of the following situations.
a) During normal production, type inspection shall be carried out at least once a month;
b) When there are major changes in raw materials, auxiliary materials and production processes;
c) When production is resumed after a long-term shutdown;
d) When the quality supervision agency proposes a type inspection requirement.
7.2.2 Type inspection. all items listed in Table 1
7.3 Batching rules
Products of the same production batch form one batch.
7.4 Judgment and reinspection rules
7.4.1 The quality department of the manufacturer shall inspect. Each batch of bleached shellac left the factory shall meet the requirements of this Standard. The mandatory indicators shall be inspected once within 2 months, and a quality certificate in a certain format shall be attached.
7.4.2 If any indicator in the inspection result does not meet the requirements of this Standard,
re-sampling shall be taken from twice specimens and the unqualified index shall be re-tested.
If it still does not meet the requirements, the product is unqualified.
7.4.3 If the supplier and the purchaser have any disputes over the inspection results, they shall be raised within 3 months after arrival. Both parties can jointly take 3 samples according to the sampling method cited in this Standard; keep one portion each; and entrust the other portion to the inspection department with corresponding qualifications for arbitration analysis. […]
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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
Similar standards
Editions of GB/T 8140
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 8140-2009 | Bleeched shellac | current edition | Current |
| GB/T 8140-1987 | Bleeched shellac | previous edition | Superseded |
This page sells the current edition, GB/T 8140-2009. Earlier editions are listed for reference only.
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Related Standards
GB/T 5009.11-2003 — Determination of total arsenic and abio-arsenic in foods
GB/T 5009.12-2003 — Determination of lead in foods
GB/T 8142-2008 — Methods of sampling lac products
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