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QB/T 2716-2018 PDF English

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QB/T 2716-2018: Leather -- Preparation of chemical test samples
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QB/T 2716: Historical versions

Standard IDUSDBUY PDFDeliveryStandard Title (Description)Status
QB/T 2716-201880 Add to Cart Auto, 9 seconds. Leather -- Preparation of chemical test samples Valid
QB/T 2716-2005279 Add to Cart 3 days Leather. Preparation of chemical test samples Obsolete

Similar standards

GB/T 16799   GB/T 4689.21   QB/T 2710   

QB/T 2716-2018: Leather -- Preparation of chemical test samples

---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/QBT2716-2018
LIGHT INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 59.140.30 Classification No.: Y 46 Filing No.: 67447-2019 Replacing QB/T 2716-2005 Leather - Preparation of chemical test samples (ISO 4044:2008, Leather - Chemical tests - Preparation of chemical test samples, MOD) ISSUED ON: DECEMBER 21, 2018 IMPLEMENTED ON: JULY 01, 2019 Issued by: Ministry of Industry and Information Technology of PRC

Table of Contents

Foreword ... 3 1 Scope ... 5 2 Normative references ... 5 3 Principles ... 5 4 Devices ... 5 5 Sampling and preparation of specimen ... 5 6 Preservation of specimen ... 6 7 Test report ... 6

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces QB/T 2716-2005 "Leather - Preparation of chemical test samples". Compared with QB/T 2716-2005, in additional to editorial changes, the main technical differences between this standard and QB/T 2716-2005 are as follows: - ADD reference to "QB/T 2707"; - In "3 Principles", ADD "Powder" to the cutting of the specimen; - In "4 devices", CHANGE the unit of rotation speed, from "rpm/min" to "r/min"; CHANGE the screen aperture to (4 ± 0.5) mm, which was consistent with the ISO international standard; - In "5.2 Preparation of specimen", CHANGE the strip size of the specimen, before cutting into "Determined by the feeding system of the cutting device"; DELETE the "Note 1" in the original standard; ADJUST the conditioning of the dried specimen to the explanatory "Note 2"; ADD the content of test cutting as the explanatory "Note 1"; - ADD the provisions for hand-cut samples. This standard uses the redrafting method, to modify and adopts ISO 4044:2008 "Leather - Chemical tests - Preparation of chemical test samples". The method, which is used by ISO 4044:2008, is based on the method standard IUC 3 of the International Union of Leather Technologists and Chemists (IULTCS). The technical differences between this standard and ISO 4044:2008 are: - In "Normative references", USE the relevant national standards of China; ADD the reference to "QB/T 2706"; - ADJUST the cleaning operation of the cutting device in "5 Preparation of specimen" in the original international standard, to the explanatory note to "4 Device"; - DIVIDE "5 Preparation of specimen" into "5.1 Sampling" and "5.2 Preparation of specimen"; ADD the provisions for "Sampling" in 5.1; ADJUST part of the content to the explanatory note to "5.2 Preparation of specimen"; - ADD the provisions for hand-cut samples; - ADD the content of "7 Test report", for ease of use. Leather - Preparation of chemical test samples

1 Scope

This standard specifies the preparation method of leather specimens for chemical testing. This standard applies to all types of leather.

2 Normative references

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard. QB/T 2706 Leather - Chemical physical and mechanical and fastness tests - Sampling location (QB/T 2706-2005, ISO 2418:2002, MOD) QB/T 2707 Leather - Physical and mechanical tests - Sample preparation and conditioning (QB/T 2707-2018, ISO 2419:2006, MOD)

3 Principles

Use a cutting device, to cut the leather samples into granules or powders of suitable size.

4 Devices

The cutting device is equipped with a rotating cutting knife; the rotating speed is 700 r/min ~ 1000 r/min; the cutting knife is as sharp as possible; it is equipped with a screen with an aperture of (4 ± 0.5) mm. Note: Cutting devices, screens, collectors shall be completely cleaned after each use, BUT they shall not be washed with water.

5 Sampling and preparation of specimen

5.1 Sampling Carry out according to the requirements of QB/T 2706. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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