ICS 71.100.40 
 
Reference number  
DRS  283: 2022 
© RSB 2022 
  
 RWANDA 
STANDARD  DRS 
283  
 
Second  edition  
2022-mm-dd 
 
Liquid glass cleaner  — Specification  
 
   
DRS  283: 2022 
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    ©RSB 2022 - All rights reserved  
 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 
editio n 
 
 
 
 
 
 
 
 
© 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 : 
Rwanda Standards  Board  
P.O Box 7099 Kigali -Rwanda  
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E-mail: info@rsb.gov.rw  
Website: www.rsb.gov.rw  
ePortal: www.portal.rsb.gov.rw   DRS  283: 2022 
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 Contents     Page 
 
 
1 Scope  ................................ ................................ ................................ ................................ .............  1 
2 Normative references  ................................ ................................ ................................ ...................  1 
3 Terms and definitions  ................................ ................................ ................................ ..................  1 
4 Requirements  ................................ ................................ ................................ ................................  1 
4.1 General requirements  ................................ ................................ ................................ ..................  1 
4.2 Specific requirements  ................................ ................................ ................................ ..................  2 
5 Packag ing and labelling ................................ ................................ ................................ ...............  3 
5.1 Packaging  ................................ ................................ ................................ ................................ ...... 3 
5.2 Labelling  ................................ ................................ ................................ ................................ ........  3 
6 Sampling  ................................ ................................ ................................ ................................ ....... 3 
Annex  A (normative)  Det ermination of non -volatile matter  ................................ ................................ . 4 
A.1 Procedure  ................................ ................................ ................................ ................................ ...... 4 
A.2 Calculation  ................................ ................................ ................................ ................................ .... 4 
Annex  B (normative)  Determination of specific gravity  ..........................  Error! Bookmark not defined.  
B.1 Apparatus  ................................ ................................ .........................  Error! Bookmark not defined.  
B.2 Calculation  ................................ ................................ .......................  Error! Bookmark not defined.  
 
 
 DRS  283: 2022 
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    ©RSB 2022 - All rights reserved  
 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 Standards adopted 
by technical committees are ratifie d by members of RSB Board of Directors for publication and gazettment as 
Rwanda Standards.  
DRS  283 was prepared by Technical Committee RSB/TC 042, Surface active agents . 
In the preparation of this standard, reference was made to the following standard s: 
1) KS 1455 -1, Specification for glass cleaner, Part 1: Liquid glass cleaner  
 
2) BIS IS 8540, Glass Cleaner, Liquid  
 
3) KS 820, Methods of test for waxes and polishes   
The assistance de rived from the above source is hereby acknowledged with thanks.  
This second edition cancels and replaces the first (RS  283: 2017 ), of which has been technically revised.  
Committee membership  
The following organizations were represented on the Technical Committee on Surface active agents (RSB/TC 
042) in the prep aration of this standard.  
University of Rwanda -College of Science and Technology (UR -CST)  
Rwanda Inspectorate, Competition and Consumer protection Authority (RICA)  
Standards for Sustainability (SFS)  
ORIBUT Company Ltd  
Divine Hope Company Ltd  
UBURANGA Prod ucts Ltd  
Rwanda Standards Board (RSB) – Secretariat  
 
 DRS 283: 2022 
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    ©RSB 2022 - All rights reserved  
 Liquid glass cleaner — Specification  
1 Scope  
This Draft Rwanda Standard  specifies the requirements, sampling and test methods for liquid glass cleaner.  
2 Normative references  
The following documents are referred to in the text in such a way that some or all of  their content consti tutes 
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 4318, Surface active agents and soaps — Determinatio n of water content — Azeotropic distillation 
method  
RS ISO 4316, Surface active agents — Determination of pH of aqueous solutions — Potentiometric method  
RS ASTM 6450 , Standard test method for Flash Point by Continuously Closed Cup (CCCFP) tester, 
continuo usly closed cup, flammability, flash point  
RS ISO 862 , Surface active agents — Vocabulary   
RS 278, Cosmetics — Methods of sampling  
RS EAS 346, Labelling of cosmetics — General requirements  
3 Terms and definitions  
For the purposes of this standard,  the terms and definitions given in RS ISO 862  and the following  apply . 
3.1 
glass cleaner  
a cleaning product designed primarily for cleaning surfaces made of glass. Glass cleaner does not include 
products designed solely for the purpose of cleaning optical mat erials used in eyeglasses, photographic 
equipment, scientific equipment and photocopying machines.  
4 Requirements  
4.1 General requirements  
The liquid glass cleaner shall  DRS 283: 2022 
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4.1.1  not contain suspension of solid matter and shall acquire homogeneity on gentle shaking;  
4.1.2  have no injurious effect on the user when used for its intended purpose and shall be free from toxic 
ingredients  
4.1.3  not have any disagreeable odour and be tinted in suitable colour;  
4.1.4  shall be of smooth, uniform and easy application  and shall not stain to glass surfaces ; 
4.1.5  be stable in normal conditions of storage and handling  
4.1.6  not show any setting and shall be easily dispensable on shaking.  
4.1.7  remain stable and homogeneous  when stored under normal conditions  for a period equal to its shelf -
life. 
4.2 Specific requirements  
The product shall comply with the requirements given in Table 1 when tested according the methods given 
therein.  
Table 1 — Specific requirements for liquid glass cleaner  
 
S/N Characteristics  Requirements  Test method  
i. Water content, percent by mass , max  88 RS ISO 4318  
ii. Non-volatile matters content , percent by 
mass, max  1.0 Annex A 
iii. pH 6.5-10.0 RS ISO 4316  
iv. Flash point, °C , min  93 RS ASTM 6450  
v. Specific gravity at 60°C, g/ l, min  0.9854  RS EAS 847 -7 DRS 283: 2022 
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 5 Packaging and labelling  
5.1 Packaging  
The product shall be packaged in suitable containers that are strong enough to withstand normal 
usage and transportation and that will prevent leaking, drying out and contamination of the product.  
5.2 Labelling  
In addition to the labelling requirements specified in RS EAS 346, the product shall be labelled with 
the following information:  
a) name of the product;  
b) manufacturer’s name, address and trade mark, if any;  
c) net content of the product;  
d) instructions  for use;  
e) list of ingredients  
f) country of origin  
g) manufacture date; and  
h) expiry date.  
6 Sampling  
Sampling shall be conducted in accordance with RS 278 . DRS 283: 2022 
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 Annex  A 
(normative)  
 
Determination of non -volatile matter  
A.1 Procedure  
A.1.1  Weigh accurately a 50 -g sample of the cleaner into a tared glass beaker and heat on a steam 
bath to dryness. Place the beaker in an oven at 100°C to 105°C and dry to constant mass. (If 
decomposition or discoloration of the solids occurs, carry out the drying in a vacuum oven at 45 °C to 
50°C).  
A.1.2  Report the mass of the residue as a percentage by mass of the cleaner.  
A.2 Calculation  
Non-volatile matter, 100 % by mass = [(B -C)/(A -C)] × 100  
Where,  
A: mass in g of the sample taken for test and beaker,  
B:  mass in g of the beaker and solids after drying, and  
C:  mass in g of the beaker  
  DRS 283: 2022 
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  DRS 283: 2022 
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 Bibliography  
[1] RS 283:2017 , Liquid glass cleaner — Specification  
 DRS  283: 2021  
 
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©RSB 2021  - All right s reserved