DRAFT FOR PUBLIC REVIEW  DRAFT UGANDA STANDARD  
  DUS 1700 -4 
First  Edition  
2017 -mm-dd 
 
 
 Reference number  
DUS 1700 -4:2017  
© UNBS 2017   
 School wear fabrics — Part 4: Polyester and Viscose fabrics  
 DRAFT FOR PUBLIC REVIEWDUS 1700-4 : 2017 
ii © UNBS 2017  – 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 2017 
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 UNBS. 
Requests for permission to reproduce this document should be addressed to 
The Executive Director 
Uganda National Bureau of Standards 
P.O. Box 6329 
Kampala 
Uganda 
Tel: +256 417 333 250 /1/2 
Fax: +256 414 286 123 
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  DRAFT FOR PUBLIC REVIEWDUS 1700-4: 20 17 
© UNBS 2017  – All rights reserved  iii 
 Contents Page 
Foreword ............................................................................................................................................................ iv 
1 Scope  ................................ ................................ ................................................................ ...................... 5 
2 Normative references  ................................................................ ................................ ............................ 5 
3 Requirements  ................................ ................................ ................................................................ ......... 6 
3.1 General  ................................ ................................ ................................................................ ................... 6 
3.2 Fabric  ................................ ................................ ................................................................ ...................... 6 
3.3 Defects  ................................ ................................ ................................................................ .................... 6 
4 Packing, labelling, mark ing and inspection  ................................ ................................ ....................... 7 
Annex A  (Normative)   Note to purchasers ..................................................................................................... 8  
Annex B  (Informative)   Recommended end use ........................................................................................... 9  
Annex C  (Informative)   Guide to manufactures and purchasers ............................................................... 10 
Annex D  (Normative)   Removable non-fibrous material content of textiles (scouring method) ............ 11 
B.1 Purpose  ................................ ................................ ................................................................ ................ 11 
B.2 Reagents  ................................ ................................ ................................................................ .............. 11 
B.3 Apparatus  ................................ ................................ ................................................................ ............. 11 
B.5 Procedure  ................................ ................................ ................................................................ ............. 12 
B.5.1  Prescouring  ................................ ................................ ................................................................ .......... 12 
B.5.2  Scouring  ................................ ................................ ................................................................ ............... 12 
B.6 Calculation  ................................ ................................ ................................................................ ........... 12 
B.7 Test report  ................................ ................................ ................................................................ ............ 12 
 DRAFT FOR PUBLIC REVIEWDUS 1700-4 : 2017 
iv © UNBS 2017  – All rights reserved  
 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) an d  
(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 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 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 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 7 , [Textile, Leather , Paper and Related 
products], Subcommittee SC 1 , [Textile and Related products ]. 
DUS 1700 consists of the following parts, under the general title School Clothing:  
Part 1: Basic requirements 
Part 2: Blazer fabrics 
Part 3: Polyester and wool fabrics 
Part 4: Polyester and viscose fabrics 
Part 5: Polyester and cotton fabrics 
Part 6: Shirting and blouse fabrics 
Part 7: Fabrics containing textured yarns 
Part 8: Warp knitted fabrics 
 DRAFT FOR PUBLIC REVIEWDUS  1700-4: 2017  
v  
 School wear fabrics — Part 4: Polyester and Viscose fabrics  
1 Scope  
This part of DUS 1700 covers the requirements for polyester- and-viscose fabrics, of three weave structures, 
suitable for use in the manufacture of school clothing 
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. 
DUS ISO 139 , Textiles — Standard atmospheres for conditioning and testing 
DUS ISO 9073-1 , Textiles — Test methods for nonwovens — Part 1: Determination of mass per unit area 
DUS ISO 12945-3 , Textiles — Determination of the fabric propensity to surface pilling, fuzzing or matting — 
Part 3: Random tumble pilling method 
DUS ISO 13935-1 , Textiles — Seam tensile properties of fabrics and made-up textile articles — Part 1: 
Determination of maximum force to seam rupture using the strip method 
DUS ISO 13935-2 , Textiles — Seam tensile properties of fabrics and made-up textile articles — Part 2: 
Determination of maximum force to seam rupture using the grab method 
US 441-2/ISO 7211-2 , Textiles — Woven  fabrics — construction — Methods of analysis — Part 2: 
Determination of number of threads per unit length  
US ISO 105-B02 , Textiles — Tests for colour fastness — Part B02: Colour fastness to artificial light: Xenon 
arc fading lamp test 
US ISO 105-C10 , Textiles — Tests for colour fastness — Part C10: Colour fastness to washing with soap or 
soap and soda 
US ISO 105-E04 , Textiles — Tests for colour fastness — Part E04: Colour fastness to perspiration 
US ISO 105-X12 , Textiles — Tests for colour fastness — Part X12: Colour fastness to rubbing  
US ISO 1833-1 , Textiles — Quantitative chemical analysis — Part 1: General principles of testing 
US ISO 3801 , Textiles — Woven fabrics — Determination of mass per unit length and mass per unit area 
US ISO 5077 , Textiles — Determination of dimensional change in washing and drying 
US ISO 13934-1 , Textiles — Tensile properties of fabrics — Part 1: Determination of maximum force 
DUS 1700-1, School wear fabrics — Part 1: General requirements  
 DRAFT FOR PUBLIC REVIEWDUS 1700-4 : 2017 
vi © UNBS 2017  – All rights reserved  
 3 Requirements 
3.1 General 
The fabric shall 
a) comply with the basic requirements given in DUS 1700- 1; 
b) have been made from two-ply yarns in the warp and either two-ply or single yarns in the weft; 
c) have been singed and heat-set; and 
d) have a bleached, a piece-dyed or a fibre-dyed finish or a printed pattern of the required design and 
colour(s)(see A.1). 
3.2 Fabric 
The fabric shall comply with the relevant requirements given in table 1 (see A.1). 
3.3 Defects 
The assessment and stringing of defects, in terms of 4.8 of DUS 1700-1, shall be based on the following 
LAQ’s:  
a) For pieces:  12 
b) For a lot:  10 
Table 1―Fabric requirements 
1 2 3 4 5 
Property  Requirement  US number (unless 
otherwise indicated)  
Composition, %  
Polyester, min  
Viscose, max   
50 
50 US ISO 1833 -1 
Weavea Plain  Twill Cord  Visual examination  
Breaking strength, N, min  
Warp  
Weft  
750 
520  
1000  
650  
1000  
580 US ISO 13934 -1 
Seaming properties (after washing)  
Resistance to opening at seams , 
N, min.b 
Seam strength , N, min.b 
  
125 
 
165 DUS ISO 13935 -1 and DUS 
ISO 13935 -2 
Ply of yarns  
Warp  
Weft  
2 
2 Visual examination  
Resistance to pilling  Rating , min 3-4 (i.e. slight to  moderate)  DUS ISO 12945 -3 
Removable non -fibrous material 5 Annex D  DRAFT FOR PUBLIC REVIEWDUS 1700-4: 20 17 
© UNBS 2017  – All rights reserved  vii 
 content , %, max  
Dimensional changes on 
Washing , % max  
Warp  
Weft  
 
2 
2 US ISO 5077  
Colour fastness to:  
Washing , rating, min.  
Change in colour  
Staining of transfer cloths  
Perspiration,  rating, min.  
Change in colour  
Staining of transfer cloths  
Rubbing, rating , min.  
Dry 
Wet 
Light , rating, min  
  
 
4 
3-4 
 
4 
3-4 
 
4 
3-4 
5  
US ISO 105 -C10 
 
 
US ISO 105 -E04 
 
 
US ISO 105 -X12 
 
 
US ISO 105 -B02 
 
a As required.  
b Both warp and weft directions 
 
4 Packing, labelling, marking and inspection 
The relevant clauses of DUS 1700-1 shall apply (see A.1). 
 
 DRAFT FOR PUBLIC REVIEWDUS 1700-4 : 2017 
viii © UNBS 2017  – All rights reserved  
 Annex A  
(Normative)  
 
Note to purchasers 
A.1 The following requirements shall be specified in tender invitations and in each order or contract: 
a) the finish and, in the case of plain dyed fabric, the colour(s)(see 3.1 and 4.7 of DUS 1700-1);  
b) when a printed pattern is required, the design and colour(s)(see 3.1 and 4.7of DUS 1700-1);  
c) when relevant, that a particular fibre blend is required (see table 1); 
d) the weave structure required (see table 1); 
e) the method of packing, if other than as specified (see 6.1 of DUS 1700-1); and  
f) additional marking, if required (see 6.3 of DUS 1700-1).  
A.2 The following requirements shall be agreed upon between the purchaser and the supplier: 
a) the acceptance of split or fringe selvedges (see 4.3 of DUS 1700-1); and  
b) the fabric width (see 4.4 of DUS 1700- 1). 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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© UNBS 2017  – All rights reserved  ix 
 Annex B  
(Informative)  
 
Recommended end use 
The recommended end use for the weave structures of fabrics that comply with the requirements of this part 
of DUS 1700 is given in table B.1. 
Table B.1 — Recommended end use for weave structures 
1 2 
Weave structure  End use  
Plain, twill or cord  Boys’ trouser s and shorts  
Plain or twill  Girls’ dresses, tunics and gyms  
Plain or twill  Girls’ slacks and skirts  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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x  
 Annex C  
(Informative)  
 
Guide to manufactures and purchasers 
The fabric types given in table C.1 have been found suitable for use in the manufacture of polyester-and viscose school clothing. 
Table C.1 ― Suitable fabric types 
1 2 3 4 5 6 7 8 9 10 11 12 13 
Property  Requirement  US number  
(unless otherwise 
indicated)  Typea 
SD47  PR56b PR47b SS60  SK54FDc SK55FDc SK54  PR54b SK59  PR74b SS66  
Composition , % 
Polyester  
Viscose   
65±5 
35±5 US ISO 1833 -1 
 
Weav e Plain  Cord  2/2“Z”twill  Plain  2/2“Z” 
twill Cord  Visual examination  
Mass per unit area  
(free from non -fibrous 
material), g/m2, min  185 200 210 235 235 245 245 245 255 300 315 US ISO 3801  and 
DUS ISO 9073 -1 
 
Number of threads 
per cm , min:  
Warp  
Weft  
25 
19 
  
35 
18 
  
26 
19 
  
33 
24 
  
32 
22 
  
31 
22 
  
33 
19 
  
35 
18 
  
32 
25 
  
50 
22 
  
40 
28 
 US 441 -2/ISO 7211-
2 
a Designation by the type number is restricted to fabrics that comply with the above requirements.  
b Fabric types identical to those of woven cotton and similar apparel fabrics  
c Both the polyester and the viscose components of the yarns comprise white and coloured fibres in approximately equal quantiti es. 
 DRAFT FOR PUBLIC REVIEWDUS  1700-4: 2017  
xi  
 Annex D  
(Normative)  
 
Removable non-fibrous material content of textiles (scouring method) 
B.1 Purpose 
This annex  specifies the scouring method for the determination of the removable non-fibrous material content 
of textiles. 
B.2 Reagents 
B.2.1 Soap powder or chips , as specified in US ISO 105-C10.  
B.2.2 Soap solution , that contains 1 g of soap (see B.2.1) per 1,000 mL of water. 
B.2.3 Scouring solution  that contains 3 g of sodium carbonate (Na 2CO 3) and 3 g of soap per 1,000 mL of 
water. 
B.2.4 Scouring solution  that contains a volume fraction of approximately 5 % ethanoic acid (acetic acid). 
B.3 Apparatus 
B.3.1 Analytical balance , with a resolution of 0.01 g or better. 
B.3.2 Forced-draught oven , maintained at between 105 °C and 110 °C 
B.3.3 Heat-resistant container , of size suitable for accommodating the test specimen(s) in the appropriate 
volume of soluti on 
B.4 Sampling and preparation of test specimen 
B.4.1 Take a laboratory sample in accordance with US ISO 5089. Condition the laboratory sample in 
accordance with DUS ISO 139 . From  the conditioned laboratory sample cut a test specimen of mass  
approximately  10 g (see B.3.1). 
B.4.2 Take the test specimen in accordance with US ISO 5089 or as agreed upon between the test 
laboratory and the manufacturer to assure a reasonable and acceptable reliability at a reasonable and 
acceptable confidence level. 
B.4.3 Dry the test specimen to constant mass in the forced-draught oven (see B.3.2) and record, to the 
nearest milligram, the final result as the oven-dry mass, in grams, of the test specimen before treatment. 
NOTE  Constant mass is assumed to have been attained when successive weighings, at intervals of 20 min, differ by 
less than 0.05 %. DRAFT FOR PUBLIC REVIEWDUS 1700-4 : 2017 
xii © UNBS 2017  – All rights reserved  
 B.5 Procedure 
B.5.1 Prescouring 
B.5.1.1 Immerse the test specimen, using a liquor ratio of 100 mL/g of the oven-dried mass of the test 
specimen (see B.4.3), in the soap solution (see B.2.2 and B.3.3) maintained at boiling point, and allow it to boil 
for 15 min. 
B.5.1.2 Rinse the test specimen twice with water at a temperature of 80 °C ± 5 °C. 
B.5.2 Scouring 
B.5.2.1 Immerse the test specimen, using a liquor ratio of 100 mL/g of the oven-dried mass of the test 
specimen (see B.4.3), in the scouring solution (see B.2.3) maintained at 75 °C ± 5 °C, and allow the test 
specimen to steep in the solution for 30 min with intermittent stirring. 
B.5.2.2 Rinse the test specimen five times with water at a temperature of 80 °C ± 5 °C. 
B.5.2.3 Rinse the test specimen once with the souring solution (see B.2.4) and then five times with cold 
water. 
B.5.2.4 Dry the test specimen to constant mass in the forced-draught oven and record, to the nearest 
milligram, the final result as the oven-dry mass, in grams, of the test specimen after treatment. 
B.6 Calculation 
Calculate the removable non-fibrous material content of the test specimen as follows: 
100
12 1mmmN
 
where 
N is the non-fibrous material content, expressed as a percentage of the oven-dried mass of the test 
specimen; 
m1 is the oven-dry mass, in grams, of the test specimen before treatment (see B.4.3); 
m2 is the oven-dry mass, in grams, of the test specimen after treatment (see B.5.2.4). 
B.7 Test report 
Report the following information: 
a) all the data needed to identify the laboratory sample tested; 
b) confirmation that the test was carried out in accordance with this standard; 
c) if applicable, the sampling method used (see B.4.2); 
d) any deviation from this standard; and 
e) the percentage of non-fibrous material content present. DRAFT FOR PUBLIC REVIEWDUS 1700-4: 20 17 
© UNBS 2017  – All rights reserved  xiii 
 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 standard.  
Further particulars of the terms and conditions of licensing may be obtained from the Director, Uganda 
National Bureau of Standards.  
 
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ICS nn.nnn.nn  
Price based on nn pages 
© UNBS 2017 – All rights reserved