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LY/T 1639-2005: Hide power (slightly chromated)
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| LY/T 1639-2005 | English | 279 |
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Hide power (slightly chromated)
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LY/T 1639-2005
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Basic data | Standard ID | LY/T 1639-2005 (LY/T1639-2005) | | Description (Translated English) | Hide power (slightly chromated) | | Sector / Industry | Forestry Industry Standard (Recommended) | | Classification of Chinese Standard | B72 | | Classification of International Standard | 71.040.30 | | Word Count Estimation | 8,826 | | Date of Issue | 2005-08-16 | | Date of Implementation | 2005-12-01 | | Summary | This standard specifies the technical requirements chrome hide powder, sampling, test methods, inspection rules and signs, packaging, storage and transport requirements. This standard applies to vegetable tannin analysis of chromium powder and flour. | LY/T 1639-2005: Hide power (slightly chromated)---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.
Hide power (slightly chromated)
ICS 71.040.30
B72
People's Republic of China Forestry Industry Standard
Chrome skin powder
Released on.2005-08-16
Implementation of.2005-12-01
State Forestry Administration released
Foreword
This standard was proposed by the Institute of Chemical Industry of Forest Products of the Chinese Academy of Forestry.
This standard is under the jurisdiction of the Institute of Chemical Industry of Forest Products of the Chinese Academy of Forestry.
This standard was drafted by the Institute of Chemical Industry of Forest Products of the Chinese Academy of Forestry.
The main drafters of this standard. Chen Yuhong, Wang Yumei, Wu Dongmei, Wu Zaijun, Bi Liangwu and so on.
Chrome skin powder
Warning - Personnel using this standard should have practical experience in formal laboratory work. This standard does not indicate all possible security questions.
question. It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the relevant national regulations.
1 Scope
This standard specifies the technical requirements, sampling, test methods, inspection rules, and marking, packaging, storage and transportation requirements for chrome skin powder.
This standard applies to chrome skin powder for plant tannin analysis.
2 Normative references
The terms in the following documents become the terms of this standard by reference to this standard. All dated references, followed by all
Modifications (not including errata content) or revisions do not apply to this standard, however, parties to agreements based on this standard are encouraged to study
Is it possible to use the latest version of these files? For undated references, the latest edition applies to this standard.
GB/T 6682 Analytical laboratory water specifications and test methods
QB/T 3812.12 Determination of moisture and other volatiles in leather
QB/T 3812.14 Determination of total ash content of leather sulfate and insoluble ash of sulfated water
QB/T 3812.15 Determination of leather chromium oxide (Cr2O3)
QB/T 3812.19 Determination of pH of leather
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
The flocculent powder obtained by the process of liming, deliming, demineralization, chromizing, dehydration, pulverization, etc. of the reticular collagen fibers of the cowhide.
4 Technical requirements
4.1 Appearance
A slightly grayish blue flocculent powder.
4.2 Technical Specifications
The chrome skin powder should meet the technical specifications given in Table 1.
Table 1 Technical specifications of chrome powder
Indicator name indicator
Loss on drying/(%) ≤ 14.0
Absorption of tannin capacity/(g/g) ≥ 0.06
Ash/(%) ≤ 0.7
Chromium (calculated as Cr2O3)/(%) 0.3 to 0.5
Water soluble substance/(%) ≤ 0.5
pH 5.0~5.5
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