DRAFT UGANDA STANDARD  
  DUS 2260 -2 
First  Edition  
2020 -mm-dd 
 
 
 Reference number  
DUS 2260 -2: 2020 
© UNBS 2020   
  
Textiles  — Cotton yarn  — Part 2: Hosiery  
 DUS 2260 -2: 2020  
ii © UNBS 2020  – 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 2020   
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 DUS 2260 -2:2020  
© UNBS 2020  – 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 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 gove rnment, 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, Textiles, Paper and 
Leather Products , Subcommittee SC 1, Textiles and related products . 
WDUS 2260  consists of the following parts, under the general title Textiles — Cotton yarn  
  Part 1: Weaving   
  Part 2: Hosiery   
 DRAFT UGANDA STANDARD  DUS 2260 -2: 2020  
 
© UNBS 2020  – All rights reserved  1 
 Textiles — Cotton yarn — Part 2: Hosiery  
1 Scope   
This Draft standar d specifies requirements of spun (single and doubled) grey cotton yarn  for use in knitting 
(hosiery) . 
This standard does not cover yarn  produced from blends of cotton with man -made fibres or any other fibre.  
2 Normative references   
The following referenced 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 
references, the latest edition of the referenced document (including any amendments) appli es. 
ISO 2, Textiles  — Designation  of the direction  of twist in yarns  and related  products   
US ISO 2060, Textiles  — Yarn  from packages  —
 Determination  of linear  density  (mass  per unit length)  by the skein  method  ISO 2061, Textiles  —
 Determination  of twist in yarns  — Direct  counting  method   
ISO 2062, Textiles  — Yarns  from packages  — Determination  of single -end breaking  force  and elongation  at  
break  using  constant  rate of extension  (CRE)  tester   
ISO 6741 -1, Textiles  — Fibres  and yarns  — Determination  of comme rcial mass  of consignments  — Part 1:  
Mass  determination  and calculations   
ISO 6939, Textiles  — Yarns  from packages  —Method   of  test  for  breaking   strength   of  yarn  by  the  skein   
method  
ISO 16549, Textiles  — Unevenness  of textile  strands  — Capacita nce method   
ISO 17202, Textiles  — Determination  of twist in single  spun  yarns  — Untwist/retwist  method   
ASTM D2255, Standard  test method  for grading  spun  yarns  for appearance   
ASTM D5647, Standard  guide  for measuring  hairiness  of yarns  by the photo -electri c apparatus  
3 Terms and definitions   
For the purposes of this document, the following terms and definitions apply.  
ISO and IEC maintain terminological databases for use in standardization at the following addresses:  
— ISO Online browsing platform: availa ble at http://www.iso.org/obp   
2 © UNBS 2020  – All rights reserved  
 3.1  
cotton count (Ne)  
number of hanks (each measuring 768 m or 840 yd) in 453.6 g (or 1 lb)  
3.2  
count lea strength product (CSP)  
product of the lea breaking load in pounds and cotton count  
3.3  
grey cotton yarn  
yarn as it le aves the spinning frame without any bleaching , dyeing or finishing treatment  
Note 1 to entry: The yarn may be waxed or unwaxed  
3.4  
hairiness index  
total length of protruding fibres in the yarn in cm with reference to the sensing length of 1 cm yarn  
3.5  
lea 
continuous length of yarn measuring 109.73 m (120 yd) in the form of a coil having 80 wraps wound on a reel 
of 1.37 m (1.5 yd) girth  
3.6  
breaking load   
maximum load (or force) applied to a specimen in a tensile test carried to rupture  
3.7  
single yarn  tenacity  
tensile stress of a single strand at rupture expressed as force per unit linear density of the unstrained 
specimen expressed usually as cN/tex (gf/tex).  
3.8  
tex  
number of grams per kilometre of yarn  
3.9  
ring spun yarn  
yarn spun on a system emp loying flat top cards and roller drafting assemblies with or without aprons on 
drawing, roving and ring frames  
3.10 
doubled y arn  
yarn in which two or more single ya rns are twisted together in one or two operations.  
4 Requirements  
4.1 General  
4.1.1  Yarn Co unt 
4.1.1.1  The average resultant count of yarn shall be as agreed between the purchaser and manufacturer.  
4.1.1.2  A tolerance of ± 3.0 percent shall be permissible on the count of yarn 
4.1.1. 3 Yarn count shall be determined in accordance with US ISO 2060 . CDUS 2260 -2: 2020  
© UNBS 2020  – All rights reserved  3 
 4.1.2  Yarn twist  
4.1.2.1  The twist in yarn shall be as agreed to between the purchaser and manufacturer. However, the 
twist multiplier of single yarn shall not exceed 3.8 in case of combed yarn and 4.0 in case of carded yarn.  
4.1.2.2  The number of turns p er unit length shall be determined in accordance with ISO 2061 or ISO 
17202. The direction for twist shall be indicated by the capital letter “S” or “Z” as specified in ISO 2.  
4.1.2.2  The average twist shall be within ± 10 percent and ± 5 percent of the sp ecified value for single 
spun yarn and doubled yarn respectively  
NOTE  Twist multiplier is calculated as follows:  
 
4.1.3  Moisture regain  
Unless otherwise agreed to between the purchaser and manufacturer, the moisture regain shall not exceed 
8.5 percent wh en determined in accordance with ISO  6741 -1. 
4.1.4  Yarn appearance  
When determined in accordance with ASTM  D2255 , the average black board appearance (5 boards) shall be 
at least of Grade B. In case of yarn counts coarser than 98 tex (6s), this shall be as agreed to between the 
purchaser and the manufacturer.  
4.1.5  Freedom from defects  
The yarn on cones/cheeses shall be free from the following defects:  
a) stitches of more than 2.5 cm in length at the base;  
b) excessive stitches at the nose;  
c) soft cones or cheeses;  
d) prominent stains inclusive of chalk and other markings;  
e) cut threads;  
f) absence of tail end where it is required and the length of the tail -end should not be less than 30 cm;  
g) entanglement;  
h) presence of hard waste;  
i) ribbon formation;  
j) drum cuts;  
k) count mix up.  
4.2 Hosiery  single yarn  
4.2.1 Hosiery  single grey cotton carded or combed yarn  shall comply with the requirements given in Table 1 
or Table 2 respectively.   
4 © UNBS 2020  – All rights reserved  
 4.2.2  When determined in accordance with ISO 6939, t he coefficient of variation of lea breaking load s hall 
not exceed 10.0 percent  
Table 1 — Performance requirements of c arded hosiery  single yarn  
Parameter  Requirements  
Test 
Method  ≥ 59 tex 
(≤ 10s)  36.9 tex – 
53.7 tex 
(10s – 
16s) 29.5 tex – 
34.7 tex 
(17s – 
20s) 20.3 tex – 
28.1 tex 
(21s – 
29s) 15.1 tex – 
19.7 tex 
(30s – 
39s) 10.9 tex – 
14.8 tex 
(40s – 
54s) 10.9 tex 
(54s) and 
finer 
Count CV, %, Max.  1.80 2.00 2.00 2.00 2.20 2.20 2.40 US ISO 
2060  
CSP, Min.  1 700 1 800 1 800 1 900 1 900 2 000 2 100 Annex A  
Yarn Tenacity 
cN/tex, Min.  13.0 13.5 14.0 15.0 15.5 16.0 16.0 ISO 2062  
Lea breaking load 
CV, %, Max.  6.0 ISO 6939  
Yarn Tenacity CV, 
%, Max.  11.0 11.0 11.5 11.5 12.0 12.0 12.5 ISO 2062  
Breaking 
elongation, %, 
Max.  5.6 5.3 5.0 ISO 2062  
Unevenness, %, 
Max. 11.00 11.50 11.80 12.50  13.00 15.00 15.50  ISO 
16549  
Hairiness Index , 
Max.  10.0 9.0 8.5 8.0 7.5 6.5 6.0 ASTM 
D5647  
Imperfections/Km . 
Thin 
Thick  
Neps  
Total   
3 
85 
90 
178  
3 
90 
100 
193  
8 
120 
172 
300  
12 
180 
238 
430  
20 
260 
420 
700  
50 
275 
475 
800  
50 
350 
800 
1 200  ISO 
16549  
NOTE  The unevenness percentage (U %) and the imperfections per Km of the yarn on packages shall not exceed 
the values given in Table 1 when tested at a speed of  400 m/min and at sensitivity of -50%, +50% and +200% for thin 
places, thick places and neps respectively  
Table 2 — Performance requirements of combed hosiery  single yarn  
Parameter  
 Requirements  
Test 
Method  ≥ 59 tex 
(≤ 10s)  36.9 – 
53.7 tex 
(10s – 
16s) 29.5 – 
34.7 tex 
(17s – 
20s) 20.3 – 
28.1 tex 
(21s – 
29s) 15.1 – 
19.7 tex 
(30s – 
39s) 10.9 – 
14.8 tex 
(40s – 
54s) 7.9 - 
10.7 tex 
(55s – 
74s) 7.8 tex 
(75s) 
and 
finer 
Count CV, %, Max.  1.60 1.80 1.80 1.80 1.80 1.80 2.20 2.20 US ISO 
2060  
CSP, Min.  2 000 2 100 2 100 2 200 2 200 2 300 2 350 2 300 Annex A  
Lea breaking load 
CV, %, Max.  5.5 6.0 6.2 6.4 6.6 6.6 6.8 7.0 ISO 6939  
Yarn Tenacity 
cN/tex, Min.  14.0 14.0 14.5 15.0 15.5 16.0 16.5 16.5 ISO 2062  
Yarn Tenacity C V, 9.0 9.0 9.0 9.5 9.5 10.0 10.5 10.5 ISO 2062  CDUS 2260 -2: 2020  
© UNBS 2020  – All rights reserved  5 
 %, Max.  
Breaking 
elongation, %, Max  5.0 4.8 4.8 4.6 ISO 2062  
Unevenness, %, 
Max 8.20 8.50 8.80 9.60 10.50 12.00 12.50 13.50 ISO 
16549  
Hairiness Index  6.5 6.0 5.7 5.5 5.0 4.5 4.0 3.5 ASTM 
D5647  
Imperfection s/Km  
Thin 
Thick  
Neps  
Total   
0 
4 
6 
10  
0 
8 
15 
23  
0 
9 
18 
27  
0 
14 
26 
40  
1 
22 
47 
70  
4 
38 
78 
120  
12 
72 
146 
230  
35 
125 
240 
400 ISO 
16549  
NOTE  The unevenness percentage (U %) and the imperfections per Km of the yarn on packages shall not ex ceed the 
values given in Table 2  when tested at a speed of 400 m/min and at sensitivity of -50%, +50% and +200% for thin places, 
thick places and neps respectively  
4.3 Doubled yarn  
4.3.1 The single yarn used for producing doubled ya rn shall satisfy th e requirements speci fied in 4.1  and 
4.2. 
4.3.2 The count lea strength product (CSP) of doubled yarn shall not be less than the value calculated by 
the following relationship:  
 
4.3.3 The coefficient of variation of the lea count shall not exceed 2.0 percent  
4.3.4 The coeffici ent of variation of the lea breaking load shall not exceed 7.0 percent.  
5 Labelling  
5.1  Each cone or cheese of yarn shall be marked with the following:  
a) name of material  i.e. 100%  ‘Carded Hosiery C otton ’ or ‘Combed Hosiery Cotton’;  
b) count of yarn in ‘N e’ or ‘tex;’ 
c) lot number;  
d) manufacturer’s name, trademark or other means of identification;  
e) individual package size/mass;  
f) packaging and storage conditions.  
5.2 Each case containing cones or cheeses shall be marked with the following:  
a) name of material;  
b) count of ya rn in ‘Ne’ or ‘tex;’  
c) lot number;   
6 © UNBS 2020  – All rights reserved  
 d) manufacturer’s name, trademark or other means of identification;  
e) gross mass of bale or case;  
f) net mass of bale or case;  
g) packaging and storage conditions ; and  
h) Country of origin  
6 Packaging  
Cones or cheeses of yarn shall be packaged in suitable packaging materials which shall protect the product 
from damage during transportation, handling and storage. Cones or cheeses shall be packaged in unit 
packages and thereafter into bulk cases.  
7 Sampling  
7.1 In any consignment, the cas es containing yarn of the same type and of the same nominal count shall 
constitute a lot.  
7.2 Samples shall be drawn from ea ch lot to determine its conformance  with the requirements of the 
standard.  
7.3  Unless otherwise agreed to between the buyer and the  seller, the number of cases to be selected from 
a lot sha ll be in accordance with Table 7 . The bales or cases shall be selected at random . 
7.4 In case two or less cases are selected in the sample, at least 10 cones or cheeses shall be drawn at 
random from  each of the selected case. However, in case three or more cases are selected in the sample, at 
least five cones or cheeses shall be drawn at random from each of the selected case.  
Table 7 — Sampling  
Lot Size  Sample Size  
Up to 3  1 
4 – 10 2 
11 – 30 3 
31 – 50 5 
Over 50  8 CDUS 2260 -2: 2020  
© UNBS 2020  – All rights reserved  7 
 Annex A 
 
(normative)  
Calculation of count strength product (CSP)  
CSP is obtained by the following relationship:  
 
Where;  
The breaking load is determined in accordance with ISO 6939  
Cotton count (Ne) is determined in accordance with US I SO 2060  
 
  
8 © UNBS 2020  – All rights reserved  
 Bibliography  
IS 834:2006 , Textiles — Ring spun grey cotton y arn for hosiery  — Specification   
 CDUS 2260 -2: 2020 
© UNBS 2020  – All rights reserved  9 
 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 S tandards 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 testin g 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 obtain ed from the Director, Uganda 
National Bureau of Standards.  
 
 CDUS 2260 -2: 2020    
 
ICS 59.080.20  
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