iTeh StandardsiTeh Standards
EURUSD
Your shopping cart is empty.
ASTM

ASTM D4899-99(2016)

(Practice)

Standard Practice for Analysis of Vegetable Tanning Materials—General

Standard Practice for Analysis of Vegetable Tanning Materials—General

SIGNIFICANCE AND USE
3.1 Vegetable tanning materials are natural products containing various substances of varying composition, concentration and quality.  
3.2 The methods referenced are useful for analyzing and testing vegetable tanning materials for moisture, water-extractable substances, cold-soluble fractions, tannins, non-tannins, acidity, tanning properties, the color of tanned leather, and the presence or absence of certain admixtures.
SCOPE
1.1 This practice is intended for use in the chemical analysis of all vegetable tanning materials.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-Aug-2016
ICS
59.140.10 - Processes and auxiliary materials
Technical Committee
D31 - Leather
Drafting Committee
D31.01 - Vegetable Leather
Current Stage
Ref Project

Buy Standard

ASTM D4899-99(2016) - Standard Practice for Analysis of Vegetable Tanning Materials—GeneralASTM D4899-99(2016) - Standard Practice for Analysis of Vegetable Tanning Materials—General
PreviousNext
Standard
ASTM D4899-99(2016) - Standard Practice for Analysis of Vegetable Tanning Materials—General
English language
2 pages
sale 15% off
Preview
sale 15% off
Preview
REDLINE ASTM D4899-99(2016) - Standard Practice for Analysis of Vegetable Tanning Materials—GeneralREDLINE ASTM D4899-99(2016) - Standard Practice for Analysis of Vegetable Tanning Materials—General
PreviousNext
Standard
REDLINE ASTM D4899-99(2016) - Standard Practice for Analysis of Vegetable Tanning Materials—General
English language
2 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D4899 − 99 (Reapproved 2016)
Standard Practice for
1
Analysis of Vegetable Tanning Materials—General
This standard is issued under the fixed designation D4899; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D6405 Practice for Extraction of Tannins from Raw and
Spent Materials
1.1 This practice is intended for use in the chemical analysis
D6406 Test Method for Analysis of Sugar in Vegetable
of all vegetable tanning materials.
Tanning Materials
1.2 The values stated in SI units are to be regarded as
D6407 Test Method for Analysis of Iron and Copper in
standard. No other units of measurement are included in this
Vegetable Tanning Materials
standard.
D6408 Test Method for Analysis of Tannery Liquors
1.3 This standard does not purport to address all of the
D6409 Practice for Color Tests with Sheepskin Skiver
safety concerns, if any, associated with its use. It is the
D6410 Test Method for Determining Acidity of Vegetable
responsibility of the user of this standard to establish appro-
Tanning Liquors
priate safety and health practices and determine the applica-
2.2 ALCA Methods:
bility of regulatory limitations prior to use.
3
A1 Analysis of Vegetable Tanning Materials—General
3
A5 Extraction of Raw and Spent Materials
2. Referenced Documents
3
A6 Moisture in Raw and Spent Materials
2
2.1 ASTM Standards:
3
A10 Preparation of Solution of Liquid Extracts
D4900 Test Method for Lignosulfonates (Sulfite Cellulose)
A11 Preparation of Solution of Solid, Pasty, and Powdered
in Tanning Extracts
3
Extracts
D4901 Practice for Preparation of Solution of Liquid Veg-
3
A12 Cooling of Analytical Solutions
etable Tannin Extracts
3
A13 Evaporation and Drying of Analytical Solutions
D4902 Test Method for Evaporation and Drying of Analyti-
3
A20 Total Solids and Water
cal Solutions
3
A21 Soluble Solids and Insolubles
D4903 Test Method for Total Solids and Water in Vegetable
3
A22 Non-Tannins and Tannin
Tanning Material Extracts
3
A25 Analysis of Tannery Liquors
D4904 Practice for Cooling of Analytical Solutions
3
A30 Sugar in Tanning Materials
D4905 Practice for Preparation of Solution of Solid, Pasty
3
A31 Copper and Iron in Tanning Materials
and Powdered Vegetable Tannin Extracts
3
A40 Color Tests with Sheepskin Skiver
D6401 Test Method for Determining Non-Tannins and Tan-
3
A50 Lignosulfates (Sulfite Cellulose)
nin in Extracts of Vegetable Tanning Materials
3
A60 Official Certification
D6402 Test Method for Determining Soluble Solids and
3
J10 Sampling of Vegetable Materials Containing Tannin
Insolubles in Extracts of Vegetable Tanning Materials
D6403 Test Method for Determining Moisture in Raw and
2.3 Federal Specification
4
Spent Materials
DD-V-582 Volumetric Apparatus, Glass
D6404 Practice for Sampling Vegetable Materials Contain-
ing Tannin
3. Significance and Use
3.1 Vegetable tanning materials are natural products con-
1
This practice is under the jurisdiction ofASTM Committee D31 on Leather and
taining various substances of varying composition, concentra-
is the direct responsibility of Subcommittee D31.01 on Vegetable Leather. This
tion and quality.
practice has been adapted from and is a replacement for Method A1 of the Official
Methods of the American Leather Chemists Association.
Current edition approved Sept. 1, 2016. Published September 2016. Originally
approved in 1989. Last previous edition approved in 2009 as D4899–99 (2009).
3
DOI: 10.1520/D4899-99R16. Official Methods of the American Leather Chemists Association. Available
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or fromtheAmericanLeatherChemistsAssociation(ALCA),UniversityofCincinnati,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM P.O. Box 210014, Cincinnati, OH 45221–0014.
4
Standards volume information, refer to the standard’s Document Summary page on AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
the ASTM website. Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D4899 − 99 (2016)
3.2 The methods referenced are useful for analyzing and 5.4 General laboratory apparatus and reagents shall be
testing vegetable tanning materials for moisture, water- available. (Special apparatus and reagents are described in the
extractable substances, cold-soluble fractions, tannins, non- individual methods.)
tannins, acidity, tanning properties, the color of tanned leather,
6. Procedure
and the
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D4899 − 99 (Reapproved 2009) D4899 − 99 (Reapproved 2016)
Standard Practice for
1
Analysis of Vegetable Tanning Materials—General
This standard is issued under the fixed designation D4899; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This practice is intended for use in the chemical analysis of all vegetable tanning materials.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D4900 Test Method for Lignosulfonates (Sulfite Cellulose) in Tanning Extracts
D4901 Practice for Preparation of Solution of Liquid Vegetable Tannin Extracts
D4902 Test Method for Evaporation and Drying of Analytical Solutions
D4903 Test Method for Total Solids and Water in Vegetable Tanning Material Extracts
D4904 Practice for Cooling of Analytical Solutions
D4905 Practice for Preparation of Solution of Solid, Pasty and Powdered Vegetable Tannin Extracts
D6401 Test Method for Determining Non-Tannins and Tannin in Extracts of Vegetable Tanning Materials
D6402 Test Method for Determining Soluble Solids and Insolubles in Extracts of Vegetable Tanning Materials
D6403 Test Method for Determining Moisture in Raw and Spent Materials
D6404 Practice for Sampling Vegetable Materials Containing Tannin
D6405 Practice for Extraction of Tannins from Raw and Spent Materials
D6406 Test Method for Analysis of Sugar in Vegetable Tanning Materials
D6407 Test Method for Analysis of Iron and Copper in Vegetable Tanning Materials
D6408 Test Method for Analysis of Tannery Liquors
D6409 Practice for Color Tests with Sheepskin Skiver
D6410 Test Method for Determining Acidity of Vegetable Tanning Liquors
2.2 ALCA Methods:
3
A1 Analysis of Vegetable Tanning Materials—General
3
A5 Extraction of Raw and Spent Materials
3
A6 Moisture in Raw and Spent Materials
3
A10 Preparation of Solution of Liquid Extracts
3
A11 Preparation of Solution of Solid, Pasty, and Powdered Extracts
3
A12 Cooling of Analytical Solutions
3
A13 Evaporation and Drying of Analytical Solutions
3
A20 Total Solids and Water
3
A21 Soluble Solids and Insolubles
3
A22 Non-Tannins and Tannin
1
This practice is under the jurisdiction of ASTM Committee D31 on Leather and is the direct responsibility of Subcommittee D31.01 on Vegetable Leather. This practice
has been adapted from and is a replacement for Method A1 of the Official Methods of the American Leather Chemists Association.
Current edition approved April 1, 2009Sept. 1, 2016. Published July 2009September 2016. Originally approved in 1989. Last previous edition approved in 19992009 as
D4899–99. –99 (2009). DOI: 10.1520/D4899-99R09.10.1520/D4899-99R16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Official Methods of the American Leather Chemists Association. Available from the American Leather Chemists Association (ALCA), University of Cincinnati, P.O. Box
210014, Cincinnati, OH 45221–0014.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D4899 − 99 (2016)
3
A25 Analysis of Tannery Liquors
3
A30 Sugar in Tanning Materials
3
A31 Copper and Iron in Tanning Materials
3
A40 Color Tests with Sheepskin Skiver
3
A50 Lignosulfates (Sulfite Cellulose)
3
A60 Official Certification
3
J10 Sampling of Vegetable Materials Containing Tannin
2.3 Federal Specification
4
DD-V-582 Volumetric Apparatus, Glass
3. Significance and Use
3.1 Vegetable tanning materials are natural products containing various substances of varying composition, concentration and
quality.
3.2 The methods referenced are useful for analyzing and testing vegetable tanning materials for moisture, water-extractable
substances, cold-soluble fractions, tannins, non-
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

This May Also Interest You

ASTM
ASTM D6182-23(Test Method)
Standard Test Method for Flexibility and Adhesion of Finish on Leather

SIGNIFICANCE AND USE
5.1 This test method is intended for use on any type of finished leather.  
5.2 This test method will give an indication of the flexibility, adhesion, and strength of the finish on leather.
SCOPE
1.1 This test method is intended for use on finished leather to evaluate resistance to cracking, delamination, and discoloration of the finish when subjected to repeated flexing. This test method does not apply to wet blue.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    2 pages
    English language
    sale 15% off
  • Standard
    2 pages
    English language
    sale 15% off
ASTM
ASTM D4906-95(2023)(Test Method)
Standard Test Method for Total Solids and Ash Content in Leather Finishing Materials

SIGNIFICANCE AND USE
2.1 This test method is intended for use in determining the total solids content and the ash content of a finishing material before its use on any leather.
SCOPE
1.1 This test method covers the total solids and ash content of finishing materials.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    2 pages
    English language
    sale 15% off
ASTM
ASTM D6183-00(2021)(Test Method)
Standard Test Method for Tackiness of Finish on Leather

SIGNIFICANCE AND USE
5.1 This test method is intended for use on any type of finished leather.  
5.2 This test will give an indication of the tackiness of the finish on leather.
SCOPE
1.1 This test method is intended for use on finished leather to evaluate the tendency of cloth to adhere to it. This test method does not apply to wet blue.  
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    2 pages
    English language
    sale 15% off
ASTM
ASTM D6659-16(2021)(Practice)
Standard Practice for Sampling and Preparation of Wet Blue and Wet White for Physical and Chemical Tests

SIGNIFICANCE AND USE
4.1 The sampling procedures described in this practice have been designed to ensure random sampling of Wet Blue and Wet White for physical and chemical tests. Wet Blue and Wet White are natural products and as such are subject to extensive variability. The physical and chemical properties vary considerably depending on location on the hide, side, or skin from which the test sample is taken. Random sampling of specimens from a predefined location and orientation minimizes test bias and variability. This practice defines these parameters.
SCOPE
1.1 This practice covers the sampling and preparation of Wet Blue and Wet White for physical and chemical tests. The product is grouped into lots that are randomly sampled in such a manner as to produce a representative sample of the lot. This sample may be used to determine compliance of the lot with applicable specification requirements, and on the basis of results, the lot may be accepted or rejected in its entirety.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    3 pages
    English language
    sale 15% off
ASTM
ASTM D6656-16(2021)(Test Method)
Standard Test Method for Determination of Chromic Oxide in Wet Blue (Perchloric Acid Oxidation)

SIGNIFICANCE AND USE
5.1 The procedure described is specific for chromium in Wet Blue. Vanadium is the only common interfering element and is rarely present in quantity. The precision and accuracy of the methods are usually, at least, as good as the sampling of Wet Blue itself.  
5.2 The chromium content of Wet Blue is related to the degree of tannage obtained, and hence may be a matter for specification in the purchase of Wet Blue. The procedure described provides adequate accuracy for this purpose.
SCOPE
1.1 This test method covers the determination of chromic oxide in Wet Blue that has been partly or completely tanned with chromium compounds. In general, the samples will contain chromium content between 1 % and 5 % when calculated as chromic oxide expressed upon a dry basis otherwise referred to as moisture-free basis (mfb).  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 This test method does not apply to Wet White.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. See Section 9 for specific safety hazards.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    5 pages
    English language
    sale 15% off
ASTM
ASTM D6657-16(2021)(Test Method)
Standard Test Method for pH of Wet Blue and Wet White

SIGNIFICANCE AND USE
4.1 This test method is designed to measure the pH of a distilled-water extract of Wet Blue and Wet White. This is considered to be a measure of the acidity or alkalinity of the Wet Blue or Wet White. Excessive acidity or alkalinity may have a deleterious effect on the aging characteristics of Wet Blue and Wet White and the leather made from it.  
4.2 This test method is suitable for development, control, and service evaluation of wet blue.
SCOPE
1.1 This test method covers the determination of the pH of all types of Wet Blue and Wet White.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    3 pages
    English language
    sale 15% off
ASTM
ASTM D6402-99(2020)(Test Method)
Standard Test Method for Determining Soluble Solids and Insolubles in Extracts of Vegetable Tanning Materials

SIGNIFICANCE AND USE
5.1 This test method is used to determine the proportion of the total solids which are soluble solids and that proportion which are insoluble solids in a solution of tannin extract or in the water extract from raw or spent materials prepared for tannin analysis.  
5.2 The specimens are aliquots from the analytical solutions prepared from tannin extracts or the water extract solutions prepared from raw or spent materials.  
5.3 The soluble solids are defined as the portion of the total solids which are dissolved in the water and pass through a filter prepared by depositing a layer of Kaolin paste onto a standard filter paper.  
5.4 The insolubles are defined as the portion of the total solids which do not pass through the standard filter paper prepared with the layer of Kaolin paste.  
5.5 The results of this test method are dependent on a great many variables but particularly upon:  
5.5.1 The temperature conditions under which the solutions were prepared and stored and the temperature at which the current analysis is performed;  
5.5.2 The uniformity and consistency of the Kaolin paste layer deposited onto the filter paper;  
5.5.3 The rate of solution run-out from the pipette; etc. It is, therefore, essential that the method be followed exactly in order to obtain reproducible results both among specimens within a laboratory and for analyses between laboratories.
SCOPE
1.1 This test method is intended for use in determining the quantity of soluble solids and insolubles in solutions of tannin extracts, water extracts of vegetable tanning materials, or tanning liquors. This test method is applicable to the analysis of liquid, solid, pasty, and powdered tannin extracts and to the water extracts of raw or spent materials.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    3 pages
    English language
    sale 15% off
ASTM
ASTM D4901-99(2020)(Practice)
Standard Practice for Preparation of Solution of Liquid Vegetable Tannin Extracts

SIGNIFICANCE AND USE
4.1 The concentration of tannin in extracts must be reduced to analytical strength (4 g tannin per L) for analysis.  
4.2 Vegetable tannin extracts are heterogeneous mixtures of components with varying solubility.  
4.3 The solubility of such extracts is influenced by temperature and concentration, which affect the degree of dispersion and size of the component particles.  
4.4 While the solubility is better in hot water than in cold water, it is appropriate to dissolve and disperse an extract in hot water and then let the solution cool slowly to standard room temperature.
SCOPE
1.1 This practice covers the preparation of a solution of liquid extract that is to be used in the tannin analysis of that extract.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    2 pages
    English language
    sale 15% off
ASTM
ASTM D6406-99(2020)(Test Method)
Standard Test Method for Analysis of Sugar in Vegetable Tanning Materials

SIGNIFICANCE AND USE
5.1 This test method is used to determine the quantity of sugar present in vegetable tanning materials or vegetable tannin extracts. The amount of the reducing sugars, total sugars, and non-reducing sugars in a sample of material or extract can be determined by this method.  
5.2 Because of the possibility of errors in this test method it is essential that the method be followed exactly in order to obtain reproducible results both among specimens within a laboratory and for analyses between laboratories.
SCOPE
1.1 This test method covers determining the sugars present in vegetable tanning materials.  
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    6 pages
    English language
    sale 15% off
ASTM
ASTM D4900-99(2020)(Test Method)
Standard Test Method for Lignosulfonates (Sulfite Cellulose) in Tanning Extracts

SIGNIFICANCE AND USE
4.1 This test method is useful to detect possible adulteration of tanning material extract with cheap and inferior lignosulfonates.
SCOPE
1.1 This test method is intended for use in detecting the presence of lignosulfonates (sulfite cellulose) in extracts of tanning materials.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    2 pages
    English language
    sale 15% off