 DRAFT UGANDA STANDARD  
  DUS 674  
Second  Edition  
2021 
 
 
 Reference number  
DUS 674 : 2021 
© UNBS 2021  
  
Determination of wet compressibility of leather and fibreboards  
 DUS 674 : 2021 
ii © UNBS 2021 – All rights reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Users are 
responsible for its correct application  
© UNBS 20 21  
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 DUS 674 :2021  
© UNBS 2021 – All rights reserved  iii 
 Foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade, Industry and 
Cooperatives established under Cap 327, of the Laws of Uganda, as amended.  UNBS is mandated to co -
ordinate the elaboration of standards and is  
(a) a member of International Organisation for Standardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the Na tional Enquiry Point on TBT Agreement of the World Trade Organisation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and co nsists of key stakeholders 
including government, academia, consumer groups, private sector and other interested parties.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. T he committee reviews the comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
The committee responsible for this document is Technical Committee UNBS/TC 316 , Footwear  
This seco nd edition cancels and replaces the first edition (US 674:2007), which has been technically revised  
 DRAFT UGANDA STANDARD  DUS 67 4: 2021 
 
© UNBS 2021 – All rights reserved  1 
 Determination of wet compr essibility of leather and fibre boards  
1 Scope  
This draft Uganda Standard specifies a method for the determination of wet compre ssibility of leather and fibre 
boards.  
2 Normative references  
The following referenced documents 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 
references, the latest edition of the referenced document (including any amendments) applies  
US 656, Preparation of samples (leather; elastomeric material and other footwear materials)  
3 Terms and definitions  
No terms and definitions are listed in this document  
ISO and IEC maintain terminological databases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp  
4 Apparatus  
4.1 Hydraulic -type press  with two flat metal platens, each of size 50 mm x 50 mm, and having a device for 
measuring the applied force  
4.2 Micrometer  
5 Test Specimen  
A 50 mm square of the material cut by means of a suitable press -knife  
6 Procedure  
6.1 Weigh the conditioned specimen (see US 656) and me asure its thickness using a micrometer at each 
corner. Record  the mean thickness  using a micrometer . 
6.2 Wet one side of the specimen, using one -tenth of its mass of water. Apply the water slowly,  by means 
of a burette, and spread it evenly over the entire  surface.  
6.3 Carefully place the wetted sample in a desiccator containing water instead of a desiccant. Leave for 24 
h. 
6.4 Place the damp sample in the hydraulic press and subject it to a pressure of 20 MN/m2 for 3 min.   
2 © UNBS 2021 – All rights reserved  
 6.5 Remove the specimen from the press, re -measure the thickness at the same positions where the 
previous readings were taken, and record the mean thickness.  
7 Calculation  
Calculate the wet compressibility as follows:  
Wet compressibility,  % = 
100
ABA  
where  
A is the initial mean thickness , in millimetres,  of the test specimen, and 
B is the mean thickness,  in millimetres,  of compressed test specim en.  
© UNBS 2021 – All rights reserved  3 
 Bibliography  
US 674:2007, Footwear materials — Determination of wet compressibility of leather and fibreboards (Metric 
units)   
4 © UNBS 2021 – All rights reserved  
 Certification marking  
Products that conform to Uganda standards may be marked with Uganda National Bureau of Standards 
(UNBS) Certification Mark shown in the figure below.  
The use of the UNBS Certification Mark is governed by the Standards Act, and the R egulations made 
thereunder. This mark can be used only by those licensed under the certification mark scheme operated by 
the Uganda National Bureau of Standards and in conjunction with the relevant Uganda Standard. The 
presence of this mark on a product or  in relation to a product is an assurance that the goods comply with the 
requirements of that standard under a system of supervision, control and testing in accordance with the 
certification mark scheme of the Uganda National Bureau of Standards. UNBS mark ed products are 
continually checked by UNBS for conformity to that standard.  
Further particulars of the terms and conditions of licensing may be obtained from the Director, Uganda 
National Bureau of Standards.  
 
 DUS 674 : 2021   
 
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© UNBS 2021– All rights reserved   
  