The IULTCS official methods of analysis for leather
The IULTCS, through the IULTCS Testing Commissions (IUC, IUF and IUP),
provides protection for the leather tanning industry worldwide by
developing and publishing test methods that are explicitly relevant
to leather manufacture and leather usage.
Without the work of the IU Commissions, which develop
these test methods, the leather industry could be open to having to
meet performance standards of other materials that bear no relationship
to the reality of working with leather.
The IULTCS test methods are accepted by the International Organisation
for Standardisation (ISO), and following agreements in 1990 and re-affirmed
in 2005, the ISO recognises IULTCS as an International Standardising
Body. ISO has assigned the responsibility for the establishment of
test procedures for leather to IULTCS and the resultant test method
documents are published as a joint IULTCS and ISO Standards. Since
1990 many of the IU methods have been adopted by ISO as international
standards and from 2005 it has been agreed that ISO will be responsible
for publishing all new joint IULTCS and ISO Standards. Member countries
of ISO use the ISO Standards to establish their own National Standards.
Further, the European Committee for Standardisation (Comité
Européen de Normalisation - CEN) has through the CEN/TC 289
Technical Committee “Leather” adopted many of the IU /
ISO Standards. Once formally accepted the EN Standards are mandatory
in all EU member countries. The IU Commissions and the CEN TC 289
hold their technical meetings together to co-ordinate the development
of leather test methods.
Consequently, the work of the IU Commissions has led to leather test
methods that are now adopted as International, European and National
Standards. End users of leather are continually being made aware that
only official leather test methods (IU/ISO/CEN) can be used to judge
the standards, characteristics and performance of leather.
Sets of the Official IULTCS and SLTC Methods up to 2005 are published
by the Society of Leather Technologists and Chemists. They are available
in a loose-leaf, durable binder.
Orders from:
Mr M. K. Leafe, Editor, JSLTC
United Kingdom
E-mail: m.leafe@tiscali.co.uk
Price: In Sterling or USD, on application.
Copies of joint IULTCS and ISO Standards published since 2005 are
available as ISO Standards from your local National Standards Organisation.
If you have any questions or comments relating to leather test methods,
please contact either the IULTCS Secretary or the respective Chairman
of the IUC, IUF or IUP Commissions.
Dr Campbell Page
IULTCS Secretariat,
c/o VESLIC
Postfach 505
CH-4016 BASEL
SWITZERLAND
office@iultcs.org
Set out below is a complete list of the IULTCS
Official Methods together with the reference numbers for the equivalent
ISO Standards and European Norm (EN) methods.
Standards with numbers that include DIS (Draft International Standard)
or FDIS (Final Draft International Standard) are still in preparation
and are not yet officially approved Standards.
The IULTCS official methods of analysis for
leather, including the equivalent ISO and EN Standards*
- last update Jan. 2008
* if no date is listed for the IU method then the
latest version is that for the ISO Standard. Some equivalent EN Standards
can have later publication dates but they are the same as the ISO
Standard.
| IULTCS - CHEMICAL TEST METHODS |
| IU No.* |
Method name |
ISO Standard |
EN Standard |
| IUC 1
(1965) |
General comments |
- |
- |
| IUC 2 |
Sampling location (same as IUP 2) |
ISO 2418:2002 |
EN ISO
2418 |
| IUC 3 |
Preparation of chemical test samples |
ISO 4044:2008 |
EN ISO 4044 |
| IUC 4 |
Determination of matter soluble in dichloromethane and free fatty
acid content |
ISO 4048:2008 |
EN ISO 4048 |
| IUC 5 |
Determination of volatile matter |
ISO 4684:2005 |
EN ISO 4684 |
| IUC 6 |
Determination of water soluble matter, water soluble inorganic matter and water soluble organic
matter |
ISO 4098:2006 |
EN ISO 4098 |
| IUC 7 |
Determination of sulphated total ash and sulphated water insoluble
ash |
ISO 4047:1977 |
EN ISO 4047 |
| IUC 8:1
|
Determination of chromic oxide content
Part 1: Quantification by
titration |
ISO 5398-1:2007
|
EN ISO
5398-1
|
| IUC 8:2 |
Determination of chromic oxide content
Part 2: Quantification by
colorimetric determination |
ISO FDIS
5398-2
|
prEN ISO 5398-2
|
| IUC 8:3 |
Determination of chromic oxide content
Part 3: Quantification by
atomic absorption spectrometry |
ISO 5398-3:2007
|
EN ISO
5398-3
|
| IUC 8:4
|
Determination of chromic oxide content
Part 4: Quantification by
inductively coupled plasma (ICP-OES) |
ISO 5398-4:2007
|
EN ISO
5398-4
|
| IUC 9 |
Determination of water soluble magnesium salts |
ISO 5399:1984 |
EN ISO 5399 |
| IUC 10 |
Determination of nitrogen and hide substance |
ISO 5397:1984 |
- |
| IUC 11 |
Determination of pH and difference figure |
ISO 4045:2008 |
EN ISO 4045 |
| IUC 13
(1975) |
Determination of zirconium |
- |
- |
| IUC 15
(1973) |
Determination of phosphorus |
- |
- |
| IUC 16
(1969) |
Determination of aluminium |
- |
- |
| IUC 17
(1980) |
Determination of hydroxyproline in materials
containing collagen |
- |
- |
| IUC 18 |
Determination of hexavalent chromium
content |
ISO 17075:2007 |
EN ISO 17075 |
| IUC 19:1 |
Determination of formaldehyde content in leather
Part 1: Quantification by HPLC |
ISO FDIS
17226-1 |
prEN ISO
17226-1 |
| IUC 19:2 |
Determination of formaldehyde content in leather
Part 2: Quantification by colorimetric analysis |
ISO FDIS
17226-2 |
prEN ISO
17226-2 |
| IUC 20 |
Method for the detection of certain azo
colourants in dyed leathers |
ISO/TS 17234:2003 |
CEN ISO/TS 17234 |
| IUC 21
(2003) |
Method for the detection of certain azo
colourants in dyestuff mixtures. |
- |
- |
| IUC 22
(2003) |
Determination of aluminium oxide content of aluminium tanning agents |
- |
- |
| IUC 24
(2003) |
Determination of basicity of aluminium tanning agents. |
- |
- |
| IUC 25 |
Determination of pentachlorophenol content |
ISO 17070:2007 |
EN ISO 17070 |
| IUC 26 |
Determination of free-formaldehyde content in leather processing
chemicals |
ISO DIS 27587 |
prEN ISO CD 27587 |
| IULTCS – PHYSICAL TEST METHODS |
| IU No. |
Method name
|
ISO Standard |
EN Standard |
| IUP 1 & IUP 3 |
Sample preparation and conditioning |
ISO 2419:2006 |
EN ISO 2419 |
| IUP 2 |
Sampling location (same as IUC
2) |
ISO 2418:2002 |
EN ISO 2418 |
| IUP 4 |
Measurement of thickness |
ISO 2598:2002 |
EN ISO 2589 |
| IUP 5 |
Measurement of apparent density |
ISO 2420:2002 |
EN ISO 2420 |
| IUP 6 |
Measurement of tensile strength and percentage elongation |
ISO 3376:2002 |
EN ISO 3376 |
| IUP 7 |
Measurement of static absorption
of water |
ISO 2417:2002 |
EN ISO 2417 |
| IUP 8 |
Measurement of tear load – Double
edge tear |
ISO 3377-2:2002 |
EN ISO 3377-2 |
| IUP 9 |
Measurement of distension and strength of grain by the ball burst
test |
ISO 3379:1976 |
- |
| IUP 10 |
Water resistance of flexible leather |
ISO 5403:2002 |
EN ISO 5403 |
| IUP 11 |
Measurement of water resistance of heavy leather |
ISO 5404:2002 |
EN ISO 5404 |
| IUP 12 |
Measurement of resistance to grain cracking and the grain crack
index |
ISO 3378:2002 |
EN ISO 3378 |
| IUP 13
(1961) |
Measurement of two dimensional extension |
- |
- |
| IUP 14
(1960) |
Measurement of waterproofness of gloving leathers |
- |
- |
| IUP 15 |
Measurement of water vapour permeability |
ISO 14268:2002 |
EN ISO 14268 |
| IUP 16 |
Measurement of shrinkage temperature
up to 100 °C |
ISO 3380:2002 |
EN ISO 3380 |
| IUP 17
(1966) |
Assessment of the resistance of air dry insole leathers to heat |
- |
- |
| IUP 18
(1969) |
Resistance of air dry lining leathers to heat |
- |
- |
| IUP 19
(1969) |
Resistance of air dry upper leather to heat |
- |
- |
| IUP 20 |
Measurement of flex resistance
by flexometer method |
|
