ICS 97.160  
 
Reference number  
DRS 502-1: 2022  
© RSB 2022  
  
 RWANDA 
STANDARD  DRS 
502- 1 
 
First edition  
2022 -mm-dd 
 
Blankets — Specification —  
Part 1: Bed blankets  
   
DRS 502-1: 2022  
©RSB 2022 - All rights reserved                  ii 
 In order to match with technological development and to keep continuous progress in industries, 
standards are subject to periodic review. Users shall ascertain that they are in possession of the latest 
edition  
 
 
 
 
 
 
 
 
© RSB 2022 
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized 
in any form or by any means, electronic or mechanical, including photocopying and microfilm, without 
prior written permission from R SB. 
Requests for permission to reproduce this document should be addressed to : 
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Toll Free: 3250  
E-mail: info@rsb.gov.rw  
Website: www.rsb.gov.rw  
ePortal: www.portal.rsb.gov.rw   DRS 502-1: 2022  
iii                ©RSB 2022 - All rights reserved  
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  2 
total number of blankets included in the contract of supply  ................................ ................................ .........  2 
4 Requirements  ................................ ................................ ................................ ................................ .........  2 
4.1 General requirements  ................................ ................................ ................................ ...........................  2 
4.2 Specific requirements  ................................ ................................ ................................ ...........................  3 
4.2.1  Fabric  ................................ ................................ ................................ ................................ ......................  3 
4.2.2  Colour fastness  ................................ ................................ ................................ ................................ ..... 2 
4.2.3  Restricted colourants ................................ ................................ ................................ ............................  2 
4.2.4  Stitching  ................................ ................................ ................................ ................................ .................  2 
4.3 Size of blankets  ................................ ................................ ................................ ................................ ..... 3 
5 Packaging  ................................ ................................ ................................ ................................ ...............  3 
6 Labelling  ................................ ................................ ................................ ................................ .................  3 
6.1 Individual blanket  ................................ ................................ ................................ ................................ .. 3 
6.2 Bulk container  ................................ ................................ ................................ ................................ ........  4 
7 Sampling  ................................ ................................ ................................ ................................ ................  4 
 DRS 502-1: 2022  
©RSB 2022 - All rights reserved                  iv 
 Foreword   
Rwanda Standard s are prepared  by Technical Committees and approved by Rwanda Standards Board (RSB) 
Board  of Directors in  accordance with the procedures of RSB, in compliance with Annex 3 of the WTO/TBT 
agreement on the preparation, adoption and application of standards.  
The main task of technical committees is to prepare national standards.  Final Draft Rwanda S tandards 
adopted by Technical committ ees are ratifie d by me mbers of RSB Board of Director s for publication and 
gazettment as Rwanda Standards.  
DRS 502-1 was prepared by Technical Committee RSB/TC 029, Textile and leather technology . 
In the preparation of this standard, reference was made to the following standards:  
SANS 63:2009, Blankets  
The assistance derived from the above source is hereby acknowledged with thanks.  
DRS 502 consists of the following parts, under the general title Blankets — Specification : 
⎯ Part 1: Bed blankets  
⎯ Part 2: Electric  blankets  
Committee membership  
The following organizations were represented on the Technical Committee on Textile and leather technology  
(RSB/TC 029) in the preparation of this standard.  
DIKAM Ltd  
GBF Leather and Art promoters Ltd  
HE works Rwanda silk L td 
Kigali Garment Centre Ltd (KGC)   
LIXIL SATO  
Ministry of Trade and Industry (MINICOM)  
MULTIPHAR UBIPHARM Rwanda Ltd  
Rwanda Inspectorate, Competition and Consumer Protection Authority (RICA)  DRS 502-1: 2022  
v                ©RSB 2022 - All rights reserved  
 Sunbelt textiles Rwanda Ltd  
University of Rwanda -College of Science and Technology (UR -CST)  
UTEXRWA Ltd  
Rwanda  Standards Board  (RSB) – Secretariat  
 DRS 502-1: 2022  
1                ©RSB 2022 - All rights reserved  
 Blankets — Specification — Part 1: Bed blankets  
1 Scope  
This Draft Rwanda Standard specifies the requirements, sampling and test methods for woven blankets 
intended for institutional and household use.  
This Draft Rwanda Standard does not apply to electric  blankets.  
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 references, 
the latest edition of the referenced document (including any amendments) applies.  
RS ISO 105 -B01, Textiles — Tests for colour fastness — Part B01: Colour fastness to light: Daylight  
RS ISO 105 -C10, Textiles — Tests for colour fastness — Part C10: Colour fastness to washing with soap or 
soap  and soda  
RS ISO 105 -X12, Textiles — Tests for colo ur fastness — Part X12: Colour fastness to rubbing  
RS ISO 105 -B02, Colour fastness to artificial light: Xenon arc fading lamp test   
RS ISO 105 -D01, Colour fastness to dry cleaning using perchloroethylene solvent  
RS ISO 105 -E04, Tests for colour fastness -- Part E04: Colour fastness to perspiration  
RS ISO 1833 (all parts),  Textiles — Quantitative chemical analysis  
RS ISO 3758, Care labelling code using symbols  
RS ISO 3759, Textiles — Preparation, marking and measuring of fabric specimens and garments in tests for 
determination of dimensional change  
RS ISO 3801, Textiles — Woven fabrics — Determination of mass per unit length and mass per unit area  
RS ISO 5077, Textiles — Determination of dimensional change in washing and drying  
RS ISO 5084, Textiles — Determination of thickness of textiles and textile products  
ISO 6330, Domestic washing and drying procedures for textile testing   
©RSB 2022 - All rights reserved                  2 
 RS ISO 7211 -2, Textiles — Woven fabrics — Construction — Methods of analysis — Part 2: Determination of 
number of threads per unit  length  
RS ISO 8498 ,  Woven fabrics — Description of defects — Vocabulary  
ISO 12952 -4, Textiles — Burning behaviour of bedding items —Part 4: Specific test methods for the ignitability 
by a small open flame  
RS ISO 13934 -1, Textiles — Tensile properties of fabrics — Part 1: Determination of maximum force and 
elongation at maximum force using the strip method  
ISO 14362 -3, Textiles — Methods for determination of certain aromatic amines derived from azo colorants — 
Part 3: Dete ction of the use of certain azo colorants, which may release 4 -aminoazobenzene  
ISO 14362 -1, Textiles — Methods for determination of certain aromatic amines derived from azo colorants — 
Part 1: Detection of the use of certain azo colorants accessible with a nd without extracting the fibres  
ISO 16373 -1, Textiles — Dyestuffs — Part 1: General principles of testing coloured textiles for dyestuff 
identification  
ISO 16373 -2, Textiles — Dyestuffs — Part 2: General method for the determination of extractable dyestuf fs 
including allergenic and carcinogenic dyestuffs (method using pyridine -water)  
ISO 16373 -3, Textiles — Dyestuffs — Part 3: Method for determination of certain carcinogenic dyestuffs 
(method using triethylamine/methanol)  
RS ISO 22198, Textiles — Fabrics — Determination of width and length  
ISO 24153, Random sampling and randomization procedures  
3 Terms and definitions  
For the purposes of this standard, the follow ing term and definition  apply . 
bulk 
total number of blankets included in the contract of supply  
4 Requirements  
4.1 General requirements  
4.1.1  Blanket fabric shall be made from clean and evenly spun yarns which may be white or dyed and shall 
be one of the types given in Table1. Blankets shall be free from defects as described in  RS ISO 8498  DRS 502-1: 2022  
3                ©RSB 2022 - All rights reserved  
 4.1.2  Blanket fabric of types 1 to 10 (inclusive) and type 13 shall be washed, milled and stentered to 
achieve the desired shrinkage and handle. Milling agents used also shall contain the relevant chemicals 
needed to inhibit the possibility of degradation of the  woollen fib res, e.g. moth proofing agents.  
4.1.3  When visually examined, the fabric of blankets of type 1 to type 9 (inclusive) and types 11 and 13 
shall be raised on both sides, and that of type 8 blankets shall, in addition, have a shrink -resistant fini sh.  
4.1.4  When visually examined, the fabric of type 10 blankets shall be of a cellular construction.  
4.1.5  The selvedges of a blanket shall be straight and evenly woven, except that in the case of a blanket 
with a raised finish the selvedges may have bee n trimmed and the raw edges so overlocked that no fraying of 
the cut edges of the fabric or unsightly cockling of the overlocking occurs during laundering.  
4.1.6  The raw edges at the ends of a blanket shall have been finished in one of the following ways, as 
required:  
a) by binding with a fabric of acceptable construction and colour, that is securely attached along its 
full length and at its ends to the blanket; or  
b) by hemming and whipping and no raw edges shall be exposed in hems  
4.1.7  The ends of all stitch ing shall have been neatly trimmed and loose threads removed.  
  
4.2 Specific requirements  
4.2.1  Fabric  
The fabric of different types of blankets shall comply with the appropriat e requirements given in table 1, when 
tested in accordance with the test methods specified therein.  
Table 1 — Fabric requirement sDRS 502-1: 2022  
1                ©RSB 2022 - All rights reserved  
  
 
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 
 
Prope
rty Requirement   
Test 
method  Type of blanket  
1 2 3 4 5 6 7 8 9 10 11 12 13 
Overall composition,% a
 
Wool  100 100 100 80 
 65 65 80 100 26 100 – – 40 
min. RS 
ISO 
1833  Acrylic   
 – – – – – – – – 50 – 80 min.  60 
min. 60 
max.  
Cellulosic and/or synthetic  – – – 20 35 35 20 – 24 – 20 
max.  40 
max.  – 
Mass per unit area , 
g/m2, min.  440 530 590 530 590 530 640 480 530 300 600 400 560 RS 
ISO 
3801  
Number of threads per 10 
cm, min.  
Warp   
Weft   
 
75 
75  
 
75 
83  
 
83 
83  
 
64 
64  
 
75 
87  
 
75 
71  
 
71 
67  
 
100 
110  
 
71 
67  
 
26 
36  
 
80 
80  
 
70 
50  
 
64 
64 ISO 
7211 -
2 
Breaking strength , N, min.  
Warp   
Weft   
 
780 
670  
 
800 
800  
 
950 
950  
 
1 000 
1 000  
 
1 000 
1 000  
 
1 000  
890  
 
1 110 
1 110  
 
1 000  
500  
 
1 000  
900  
 
800 
600  
 
1 000  
900  
 
900 
800  
 
1 000 
1 000 RS 
ISO 
1393
4-1, 
Tearing strength , N, 
min  110 ISO 
1393
7 
Resistance to spread 
flame, min.  Class – B ISO 
1295
2-4 
Thickness , mm, min. 
.......................................
... 4.4 5.0 5.7 5.0 5.1 5.0 6.1 5.0 5.0 – 5.0 4.0 5.0 RS 
ISO 
5084  
Non-fibrous material 
content b, c, %, max. 
........  3 3 3 4 4 4 4 3 4 3 4 4 4 RS 
ISO 
1833  
Dimensional changes on 
laundering , %, max.  
Warp   
Weft   
 
 
±3 
±3 ISO 
6330 
(Proc
edure 
4N) 
RS 
ISO 
5077 
and 
ISO 
3759  
a In the case of types 1, 2, 3, 8 and 10, subject to a tolerance of -5 % and, in the case of types 4, 5, 6, 7 and 9, subject to a tolerance of ± 5 %.  
bNon-fibrous material other than vegetable impurities.  
cOptional requirement.   
©RSB 2022 - All rights reserved                  2 
 4.2.2  Colour fastness   
 
The colour fastness of dyed blankets including the stitching threads shall be as given in Table 2, when tested 
in accordance with the test methods specified therein.  
 
 
Table 2 — Requirements for colour fastness  
 
Colour fastness to:  Minimum numerical rating   Test method  
Light  4 RS ISO 105 -B01 
ISO 105 -B02 
Washing  RS  ISO 105 -C10 
Change in colour  4 
staining  4 
Rubbing  RS ISO 105 -X12 
wet staining  3-4 
dry staining  4 
Perspiration ( Acid and Alkali)  RS ISO 105 -E04 
Colour change  4 
Staining  4 
Colourfastness to dry cleaning  RS ISO 105 -D01 
Colour change  4 
staining  4 
NOTE  Colour fastness is not a requirement for grey wool blankets  
 
4.2.3  Restricted colourants  
4.2.3.1  When tested in accordance with ISO 14362 -1 and ISO 14362 -3. The dyed blankets  shall be free 
from aromatic amines.  
4.2.3.2  Dyestuff classes shall be identified in accordance with ISO 16373 -1. When tested in accordance 
with ISO 16373 -2 and ISO 16373 -3, the d yed blankets  shall be free from carcinogenic dyestuffs . 
4.2.4  Stitching  
With the exception of cot blankets, blankets shall be either turned 15 mm and stitched at both ends only or 
turned 15 mm and stitched all round.  DRS 502-1: 2022  
3                ©RSB 2022 - All rights reserved  
 Cot blankets shall be turned 15 mm and stitc hed all round.  
4.3 Size of blankets  
When tested in accordance with RS ISO 22198, the dimensions of finished blankets shall, subject to the 
tolerance  of ± 1 %, conform to the required dimensions and  shall preferably be one of the  sets of dimensions  
given in Table 3.  
 
Table 3 — Blankets sizes  
 
75 cm × 100 cm  
115 cm × 150 cm  
150 cm × 200  cm 
175 cm × 225  cm 
180 cm x 240 cm  90 cm × 125 cm  
125 cm × 175 cm  
140 cm × 210 cm  
160 cm x 210 cm  100 cm × 150 cm  
140 cm × 200 cm  
150 cm × 225 cm 
230 cmx250 cm  
 
5 Packaging  
5.1 Blankets shall be individually folded and packaged to prevent contamination and damage during 
storage and transportation.  
5.2 Only blankets of the same type, size, colour(s) and finish shall be securely packed together in a bulk 
container.  
6 Labelling  
6.1 Individual blanket  
The following information shall appear in legible and indelible marking on a label, securely attached to an 
edge or on top (near one of the corners) o f each blanket  
a) name of product as “ Bed b lanket”;  
b) manufacturer’s  address,  name or trade mark or both;  
c) width and length  of the blanket  in centimetres;  
d) the fibre composition  and proportion ;  
e) mass per unit area, in g/m2 
f) care labelling in accordance with RS ISO  3758 ; and 
g) country of manufacture.   
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 6.2 Bulk container  
The following informa tion shall appear in legible and indelible marking on the outside of each bulk container:  
a) manufacturer’s address, name or registered trade mark  or both ; 
b) size of the blankets;  
c) colour of the blankets;  
d) number of blankets;  
e) fibre composition and proportion;  
f) batch number; and  
g) country of manufacture . 
7 Sampling   
7.1 Sampling shall be done in accordance with ISO 24153  and the samples shall be conditioned as per RS 
ISO 139.  
7.2 In the case of multi -coloured samples, all colours shall be represented by the specimens selected for 
colour fastness testing in accordance with Table 2.  
 
 
 
 
 
 
  DRS 502-1: 2022  
5                ©RSB 2022 - All rights reserved  
 Bibliography  
[1] DUS 914 -2: 2019  Bed blankets — Part 2: Blankets made from wool and wool/polyamide — 
Specification   
[2] D5432 − 12 (2019 )Standard Performance Specification for Blan ket Products for Institutional and 
Household Use1  
 
 
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