DEAS/ 1123: 2022  
ICS 61.060  
 
© EA C 2022                                                                                                                           Edition 2022   
 DRAFT EAST AFRICAN STANDARD  
 
Leather  for orthopae dic use — Specification  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
EAST AFRICAN COMMUNITY  
  DEAS/ 1123: 2022  
 
ii © EAC 2022  – All rights reserved  
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  DEAS/ 1123: 2022  
 
© EAC 2022  – All rights reserved  iii 
  
Table of Contents  
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ................................  1 
2 Normative references  ................................ ................................ ................................ ................................ ...... 1 
3 Terms and definitions  ................................ ................................ ................................ ................................ ..... 1 
4 Requirements  ................................ ................................ ................................ ................................ ...................  2 
4.1 General Requirements  ................................ ................................ ................................ ................................ . 2 
4.2 specific requirements  ................................ ................................ ................................ ................................ .. 2 
5 Marking/Labelling  ................................ ................................ ................................ ................................ ............  3 
5.1 Marking on unit leather  ................................ ................................ ................................ ................................  3 
5.2 Marking on bulk Package  ................................ ................................ ................................ ............................  3 
6 Packaging  ................................ ................................ ................................ ................................ .........................  3 
7 Sampling  ................................ ................................ ................................ ................................ ..........................  3 
 
 
  DEAS/ 1123: 2022  
 
iv © EAC 2022  – All rights reserved  
 Foreword  
Development of the East African Standards has been necessitated by the need for harmonizi ng requireme nts 
governing  quality of products and services in the East African Commun ity. It is  envisaged that through 
harmonized standardization, trade barriers that are encountered when goods and services are exchanged 
within the Community will be remove d.  
The Comm unity has established an East African Standards Committee  (EASC)  mandated  to develo p and 
issue East African Standards  (EAS) . The Committee is composed of representatives of the National 
Standards Bodies in Partner States, together with the repr esentatives from the public and private sector 
organizations  in the community .  
East African St andards are developed through  Technical Committees that are representative of key 
stakeholders including government, academia, consumer groups, private sector an d other inte rested partie s. 
Draft East African Standards are circulated to stakeholde rs through  the National Standards Bodies in the 
Partner States. The comments received are discussed and incorporated before finalization of standards, in 
accordance with the principle s and procedu res for development of East African  Standards.  
East African Standards are subject to review, to keep pace with technological advances. Users of the East 
African Standards are therefore expected to ensure that they always have the l atest versio ns of the sta ndards 
they are implementing .  
The committee responsible  for this docu ment is Technical Committee EASC/TC 063 , Leather and Leather 
Products  
Attention is drawn to the possibility that some of the elements of this document may be sub ject of pate nt 
rights. EA C shall not be held responsible for identifying any or all s uch patent  rights.  
 DEAS/ 1123: 2022  
 
© EAC 2021  – All rights reserved  
  
 Leathers for orthop aedic use — Specification  
1 Scope   
This Draft East African Standard specifies requirements  and test methods for leather intended fo r orthopaedic  
use. 
 
 
2 Normative references   
The following documents are referred to in the text in such a way that some or all  of their content constitutes 
requirements of this document.  For dated references, only the edition cited applies. For undated re ferences, 
the lates t edition of the referenced document (including an y amendments) ap plies.  
 
ISO 3380 , Leather — Determination of shrinkage temperature ISO 5398 -2:2009 Leather — Chemical 
determination of chromic oxide content — Part 2: Quantification by col orimetric determinat ion 
ISO 5398 -1:2018  Leather — Chemical determination of chromic o xide content — Part 1: Quantification by 
titration  
ISO 17075 -1:2017  Leather — Chemical determination of chromium ( VI) content in leather — Part 1: 
Colorimetric method  
ISO 4045:2018  Leather — Chemical tests — Determination of pH and difference figure  
ISO 25 89:2016  Leather — Physical and mechanical tests — Determination of thickness  
ISO 3377 -1:2011  Leather — Physical and mechanical tests — Determination of tear load — Part 1:  Single 
edge tear   
ISO 3377 -2:2016  Leather — Physical and mechanical tests — Determin ation of tear load — Part 2: Double 
edge tear  
 
ISO 17236 , Leather — Physical and mechanical tests —- Determination of extension set 
 
 
3 Terms and defini tions   
For the purposes of this standard, the following definitions shall apply:  
 
 
3.1 Orthopaedic   
ii © EAC 2022  – All rights reserved  
  Science related with the correction or preventi on of deformities, disorders, or injuries of the skeleton and 
associated structures ( such as tendons and ligam ents) 
 
 
4 Requirements  
4.1 General Requirements  
The leather shall be full grai n 
The leather shall have a natural (pearl) finish .  Pigment finish s hall not b e used  
 Leather shall be strong, flexi ble and soft. 
4.2 specific requiremen ts  
4.2.1 Leather material   
The physic al and chemical properties shall comply with the requirements given in Table 1, when tested in 
accordance with test methods specified  therein. 
 
Table 1 — Physical and chemical requireme nts  
 
Charact eristic  Requirement  Test method  
chromic oxide content ( calculated 
on a moisture -free basis) m ax,%   2.0 ISO5398 -1 
ISO 5398 -2 
Chromium (vi), max  ppm 3.0 ISO 17075 -1 
pH value, min . 
  4.5-5.5 ISO4045  
Thickn ess(mm), min 0.8 ISO 2589  
shrinkage temp erature, min . 70oC 
 ISO 3380  
Tear strength ,N min 
  
 
25N  
 
ISO 3377  
Static stretch  (%), max  
 
Set stretch  (%), max  20 
 
8   
ISO  17236  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
© EAC 2022  – All rights reserved  iii 
  
 
 
 
5 Marking /Labelli ng 
 
5.1 Marking on unit lea ther 
 
Each piece of  leather shall be marked with the following inf ormatio n 
 
a) Size in square feet  
b) Trademark  and or manufact urers name  
c) Country of origin  
d) Batch number 
e) Name “leather for orthopaedic us e” 
 
5.2 Marking on bulk Package  
 
a) Number of pieces in the b undle  
b) Size in square feet  
c) Trademark  and or manufacturers  name  
d) Country o f origin 
f) Name “leather for orthopaedic us e” 
 
6 Packaging 
 
The leather for orthopaed ic use  shall be pack ed in a way that it is protected from damage during storage and 
transp ortation.  
 
7 Sampling  
 
Sampling shall be done in accordance with ISO  2588