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GB/T 7643: Historical versions
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| GB/T 7643-2018 | English | 119 |
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| GB/T 7643-1987 | English | RFQ |
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Basic data
| Standard ID | GB/T 7643-2018 (GB/T7643-2018) |
| Description (Translated English) | Sticklac |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | B72 |
| Classification of International Standard | 65.020 |
| Word Count Estimation | 6,630 |
| Date of Issue | 2018-02-06 |
| Date of Implementation | 2018-09-01 |
| Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |
GB/T 7643-2018: Sticklac
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Sticklac
ICS 65.020
B72
National Standards of People's Republic of China
Replacing GB/T 7643-1987
Lac collagen
2018-02-06 released
2018-09-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 7643-1987 "Lac collagen."
This standard compared with GB/T 7643-1987 main technical content changes are as follows.
--- Adjust sampling method, instead of using other standards;
--- Increase the color to determine the standard color card (PANTONE);
--- Adjust the time of the heat-hardening time and two quality requirements;
--- Adjust the color index of the quality requirements;
--- Glue thickness, heat hardening time, volatiles (moisture), hot ethanol insoluble, color index five indicators of measurement, instead cited
Use other standards
--- Increasing the test rules in the test classification and test items;
--- Increased storage and transportation environment temperature requirements.
This standard proposed by the State Forestry Administration.
This standard by the National Forest Products Standardization Technical Committee (SAC/TC558) centralized.
This standard was drafted. Institute of Resources Insects, Chinese Academy of Forestry.
The main drafters of this standard. Shi Lei, Zhao Hong, Chen Xiaoming, Zhang Hong, Chen Zhiyong.
This standard replaces the standards previously issued as follows.
--- GB/T 7643-1987.
Lac collagen
1 Scope
This standard specifies the quality requirements of Shellac glue, sampling, test methods, inspection rules, signs, packaging, storage and transportation requirements.
This standard applies to the insects in both winter and summer generations of the host tree secreted by the host tree after harvest harvest, remove the tree
Sticks, dried for the production of particles shellac, shellac products such as the use of shellac.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 8142 shellac product sampling method
GB/T 8143 shellac product testing methods
GB/T 35805 Shellac glue
3 quality requirements
Lac collagen should be air-dried, free of branches, sawdust and sediment and other impurities, no mold, caking metamorphism, the technical indicators should be consistent with Table 1
Given the quality requirements.
Table 1 Collagen glue quality requirements
Indicator name
grade
Level 1 Level 2 Level 3
Color (PANTONE) Yellow-red (17-1046 TC) Brown (18-1142 TC) Purple-brown (19-1245 TC)
Glue thickness/mm ≥ 7 5 3
Volatile matter (moisture) /% ≤ 5.0 5.0 5.0
Hot set time/min ≥ 6.5 6.0 5.0
Hot ethanol insoluble matter /% ≤ 12 15 18
Color index according to the contract of both parties
4 sampling
According to the provisions of GB/T 8142.
5 test methods
5.1 Determination of color
Lac collagen appearance of the color test, according to the original plastic cross-section color identification. Color rating to determine, according to the International Standard Light Industry Color Card
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