DRAFT UGANDA STANDARD  
  DUS 766  
Second Edition  
2019 -mm-dd 
 
 
 Reference number  
DUS 766 -: 2019  
© UNBS 2019   
  
Plastic basins  — Specification  
 DUS 766: 2019  
ii © UNBS 2019  – 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 applicati on 
© UNBS 2019   
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, including photocopying and microfilm, without prior written 
permission from UN BS. 
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of Standards  
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Uganda  
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Fax: +256 41 4 286 123  
E-mail: info@unbs.go.ug  
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. DUS 766:2019  
© UNBS 2019  – 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 National Enquiry Point on TBT  Agreement  of the Worl d 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 consists 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. The committee reviews the comments before recommen ding 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 5, [Chemicals and 
Environment ], Subcommittee SC 03, [Plastics and Relate d products ]. 
This second edition cancels and replaces the first edition ( US 766:2007 ), which has been technically revised .  
 DRAFT UGANDA STANDARD  DUS 766: 2019  
 
© UNBS  2019  – All rights reserved  1 
 Plastic basins  — Specification  
1 Scope   
This Draft Uganda Standard specifies the requirements , sampling and method of test  for basins made from 
polyolefin . 
2 Normative references   
There are no normative references in this document.  
3 Terms and definitions  
No terms and definitions are listed in this document.  
ISO and IEC maintain terminological databases for use in standardi zation at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp  
3.1 
polyolefin  
a type of polymer produced from a simple olefin (also called an alkene with the general formula CnH2n) as a 
monomer.  
4 Requirements  
4.1 general requirements  
4.1.1  The basin shall be of good surface, finish, free from defects a nd any excessive sprue shall be 
removed by cutting   
4.1.2  Basins shall be described by their capacities in litres.  
4.1.3 The material of the basins shall be natural or coloured polythene or polypropylene. Materials shall be 
of food grade and free from any substance which is injurious to human health.  
4.1.4 The thickness of the basin at the sides and bottom shall be such as to enable it to comply with the 
distortion l imits specified in 4.2. There shall be no diminution of thickness in the vicinity of the sprue due to 
shrinkage or drawing in of materials at this point or to the removal of the sprue.  
4.1.5   The rim of the basin shall be such as to provide an adequate gr ip. 
4.1.6  To protect the base from abrasion, it shall be so supported that at 90°, when the basin is filled with 
water, it’s under surface excluding the ribs, is at least 5 mm above the plane surface on which it is placed.   
2 © UNBS 2019  – All rights reserved  
 4.2 Specific requirements  
Basins  shall comply with the specific requirements given in table 1.  
Table 1 — Requirements and test methods for plastic basins  
Characteristic  Requirement s Test method  
Reversion  5%, maximum  Annex A  
Splitting  2 mm  Annex B  
Surface attack  no delamination  Annex C 
Distortion  Maximum i ncrease in diameter on 
top and in depth from the rim to 
the bottom of the basin shall be 10 
% and 7 % of the initial diameter 
and depth respectively  Annex D  
Overload  The edges and the body of the 
basin shall not crack or break and 
the edges, rims or handles shall 
not detach from the supporting 
wooden frame.  Annex E  
6 Packaging  
The basins shall be packed in a suitable manner to protect them from dust and surface scratches.  
7 labelling  
Individual basin shall be legibly and indelibly  marked with the following information  in English or Swahili :  
a) name  and physical address of the manufacturer   
b) water capacity in litres;  
c) lot number /batch number ; 
d) country of origin ;and 
e) code of resin identification  
8 Sampling  
Sampling shall be done in ac cordance with annex F. DUS 766: 2019  
© UNBS 2019  – All rights reserved  3 
 Annex  A 
(normative)  
 
Reversion Test  
A.1 Specimen  
A specimen of dimensions 50 mm x 2.5 mm, shall be cut from the side of the basin such that its main axis is 
radial to the sprue. Five specimens from separate sections of the side shall  be examined in each case.  
A.2 Procedure  
The specimens shall be measured accurately and then immersed in boiling water for 30 min. On removal, they 
shall be allowed to cool for 1 h after which the length shall be measured to the nearest 0.5 mm. Reversion i s 
reduction in length expressed as a percentage of the initial length of the specimen.  
  
4 © UNBS 2019  – All rights reserved  
 Annex  B 
(Normative ) 
 
Splitting test  
B.1 Specimen  
The specimen consists of a disc 75 mm diameter with the sprue at its  centre, cut from the base of the basin. A 
slit 38 mm ± 1.5 mm long is made in the specimen so that its mid -point lies on the centre of the circular 
specimen and extends through its thickness. (The slit may conveniently be cut with a single -edged razor 
blade.)  
B.2 Procedure  
The specimen shall be immersed in boiling water for 30 min. On removal from the water bath, the specimen 
shall be allowed to cool with no applied constraint.  
 
 DUS 766: 2019  
© UNBS 2019  – All rights reserved  5 
 Annex  C 
(normative)  
 
Surface attack test  
C.1 Specimen  
The specimen used sh all be exactly similar to that employed in Annex A, but cut from the base of the basin so 
that the centre point is 75 mm from the sprue.  
C.2 Procedure  
Four specimens shall be immersed in an organic solvent at 40 °C for 4 h.  The solvent shall be containe d in 
about 150 mm x 25 mm test tube immersed in a water bath at 40 °C ± 0.5 °C and allowed to attain the 
temperature before the introduction of the specimens.  After removal from the solvent, the specimens shall be 
placed on blotting paper and allowed to d ry for 1 h. The extent and nature of the effect produced on its surface 
shall be recorded.   
6 © UNBS 2019  – All rights reserved  
 
Rim of basin  
Wooden frame  
Figure D.1 — Distortion test  Annex  D 
(normative)  
 
Distortion test  
D.1 The basin shall be suspended on its edges by use of two wooden frames laid parallel to each other and 
just touching the side s of the basin (see Figure D.1  
D.2 The diameter (d) of the basin shall be measured to the nearest 1 mm.  
D.3 The depth (h) from the edge to the bottom of the basin shall also be measured.  
D.4 Water of 90 °C shall be then poured into the basin until it is filled to a level of 25 mm from the rim.  After 
five minutes, the above dimensions shall be measured again. The changes shall be expressed as 
percentages of the initial dimensions  
 
 
 
 
 DUS 766: 2019  
© UNBS 2019  – All rights reserved  7 
 Annex  E 
(normative)  
 
Overload Test  
The basin shall be suspended as des cribed in Annex D. Lead shots or any other suitable material of a weight 
equal to twice that of water required to fill the basin shall be poured into the basin. The effect on the rim shall 
be noted in terms of the  criteria specified in Table 1   
8 © UNBS 2019  – All rights reserved  
 Annex  F  
(normative)  
 
Criteria for sampling  
To test the compliance of the basin to the requirements of this standard, unused samples shall be taken from 
factory or market at r andom in accordance with Table 2. All tested samples shall comply with all the 
requirements o f this standard  
Table 2—Sampling plan  
Lot basins  Sample for inspection and testing  
1-500 10 pieces  
500-1000  20 pieces  
 DUS 766: 2019  
© UNBS 2019  – All rights reserved  9 
 Bibliography  
[1] US 766:2007 , Plastic basin — Specification   
 DUS 766: 2019  
© UNBS  2019  – All rights reserved  11 
 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 Regulations 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 marked products are 
continually checked by UNBS for conformity to that stand ard.  
Further particulars of the terms and conditions of licensing may be obtained from the Director, Uganda 
National Bureau of Standards.  
 
 DUS 766: 2019    
 
ICS 83.080  
Price based on nn pages  
© UNBS 2019– All rights reserved