DRAFT UGANDA STANDARD  
  DUS 2449  
First Edition  
2021 -mm-dd 
 
 
 Reference number  
DUS 2449 : 2021 
© UNBS 2021   
  
Cosmetic n ail glue  — Specification  
 
 
 
 DUS 2449 : 2021  
ii © UNBS 2021  – 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 ap plication  
© UNBS 2021   
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 41 4 333 2 50/1/2/3  
Fax: +256 41 4 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  WDUS nnnn:2021  
© UNBS 2021  – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ................  iv 
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 Packaging  ................................ ................................ ................................ ................................ ... 2 
6 Labelling  ................................ ................................ ................................ ................................ ..... 2 
7 Sampling  ................................ ................................ ................................ ................................ ..... 2 
Annex  A (normative)  Determination of pH ................................ ................................ ..............................  3 
Annex  B (normative)  Determination of bond strength ................................ ................................ ............  4 
A.1 General ................................ ................................ ................................ ................................ ........  4 
A.2 Adherend test pieces  ................................ ................................ ................................ ..................  4 
A.3 Preparation of adherends ................................ ................................ ................................ ............  4 
A.3.1  General requirements  ................................ ................................ ................................ .................  4 
A.3.2 Surface pre -treatment  ................................ ................................ ................................ ....................  4 
A.4 Preparation of sample  ................................ ................................ ................................ .................  5 
A.5 Conditioning and testing ................................ ................................ ................................ .............  5 
A.5.1  Conditioning  ................................ ................................ ................................ ...............................  5 
A.5.2  Testing  ................................ ................................ ................................ ................................ ........  5 
A.6 Expression of results  ................................ ................................ ................................ ..................  6 
Annex C (normative)  ................................ ................................ ................................ ...............................  7 
C.1 Principle  ................................ ................................ ................................ ................................ ...... 7 
C.2 Procedure  ................................ ................................ ................................ ................................ ... 7 
C.3 Acceptance criteria  ................................ ................................ ................................ .....................  7 
Bibliography ................................ ................................ ................................ ................................ ............  8 
 DUS 2449 : 2021  
iv © UNBS 2021  – 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) and  
(b) a contact point for the WHO/FAO Codex Alimen tarius 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 deliber ate 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 sta keholders 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 Tec hnical Committee UNBS /TC 310, Cosmetics and related 
products . 
 DRAFT U GANDA STANDARD  DUS 2449 : 2021  
 
© UNBS  2021  – All rights reserved  1 
 Cosmetic n ail glue  — Specification  
1 Scope  
This Draft Uganda Standard specifies the requirements, sampling and test methods for  cosmetic nail glue.  
2 Normative references   
The following refere nced 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 (i ncluding any amendments) applies.  
ISO 15605 , Adhesives — Sampling  
US EAS 346, Labelling of cosmetics - General requirements  
3 Terms and definitions   
For the purposes of this document, the following terms and definitions apply.  
ISO and IEC maintain termino logical databases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp  
3.1  
cosmetic nail glue  
adhesive for applying , fixing or holding firm acrylics, artificial nails, press -on nails a nd nail art . 
3.2 
artificial nails  
extensions placed over human nails as fashion accessories. Artificial nails are also known as false nails, 
fashion nails, acrylic nails, nail extensions or nail enhancements  
3.3 
Finger /toe nails  
horny covering on the uppe r surface of the tip of the finger and toe in humans and other primates.  
3.4 
adherend  
body that is, or is intended to be, held to another body by an adhesive  
4 Requirements  
4.1 General requirements  
4.1.1 Cosmetic nail glue shall be free from visible forei gn matter.  DUS 2449 : 2021  
2 © UNBS 2021  – All rights reserved  
 4.1.2  Cosmetic nail glue shall not have any harmful effect on the human s when used as intended by the 
manufacturer . 
4.2 Specific requirements  
The product shall comply with the specific quality requirements given in Table 1 when tested in accorda nce 
with the test methods specified therein . 
Table 1 — Specific requirements for cosmetic nail glue  
S.No.  Characteristic  Requirement  Test method  
i) pH 4.0 – 7.5 Annex A  
ii) bond strength, MPa , min  17 Annex B  
iii) rapid setting property  To pass test  Anne x C 
5 Packaging  
The product shall be packaged in suitable well -sealed containers that shall protect the contents and shall not 
cause any contamination or react with the product.  
6 Labelling  
In addition to the labelling requirements in US EAS 346, the pack age shall be legibly and indelibly marked with 
the following information:   
a) name of product as “nail glue” or “nail adhesive”  
b) name and physical address of m anufacturer ;  
c) net content ; 
d) batch number.  
e) date of manufacture and expiry  
f) instructions for use;  
g) warn ings such as “keep out of children’s reach”, avoid skin contact  and 
h) storage condition s 
7 Sampling  
Sampling shall be done in accordance with ISO 15605  DUS 2449 : 2021  
© UNBS 2021  – All rights reserved  3 
 Annex  A 
(normative)  
 
Determination of pH  
Weigh 10g of the adhesive,  add distilled water to make up the vol ume to 100ml and determine pH of solution 
using pH meter.  DUS 2449 : 2021  
4 © UNBS 2021  – All rights reserved  
 Annex  B 
(normative)  
 
Determination of bond strength  
A.1 General  
This method of test is for adhesives using rigid adherends that can be produced to t he required dimensional 
tolerances and that will withstand the forces applied to them. This test method is primarily intended for use in 
normal ambient conditions.  
A.2 Adherend test pieces  
Twelve mild steel lap shear test pieces (3 mm x 100 mm x 25 mm) cu t from flat sheet, free from burrs and 
meeting the flatness requirements shall be used with thickness of tolerance (3.0 ± 0.15) mm for non -metal 
adherends shall be employed.  The adherend shall be rectangular with the following dimensions:  
a) Length: (100 mm ± 1 .5 mm); 
b) Width: (25  mm ± 0.25  mm); 
c) Flatness: within 0.5 mm over the length and width of the area of the specimen to be bonded and 
within 1.0 mm over the length of the specimen.  
The thickness of the adherends shall be such that they are able to withstand the forces that are required for 
the test, and shall be stated in the report.  
NOTE: The choice of the thickness of the adherends depends on the adherend materials, the adhesive and on the 
particular application and should be agreed between the purchaser an d the supplier of the adhesive. For general use the 
following thicknesses are recommended:  
a) Metal: (1.5 mm ± 0.15 mm); 
b) Non- metals (other than wood): (3 mm ± 0.15  mm); and  
c) Wood: (5 mm ±0.15  mm) 
If the central adherend in a double overlap joint is of the same  material as the two outer adherends, it shall 
have a thickness of twice that of one of the outer adherends.  
A.3 Preparation of adherends  
A.3.1  General requirements  
The bonding surface shall be plane and free from visible signs of rust.  
A.3.2 Surface pre -treatment  
Remove loose contamination and oily deposits from the mild steel adherend by wiping with lint -free absorbent 
cloth, wetted with propan -2-ol. Allow to dry. Blast the bonding surface of the adherends with 80 μm silicon 
carbide grit and wipe again with propan -2-ol to remove grit. Allow to dry.  DUS 2449 : 2021  
© UNBS 2021  – All rights reserved  5 
 A.4 Preparation of sample  
A.4.1  Before bonding, prepare the surfaces of the adherends in accordance with the recommendations in 
the instructions supplied by the manufacture of the adhesive. In the absence of such recomme ndations, use 
ISO 17212.  
A.4.2  Apply a small drop of adhesive to the centre of a clean prepared face of the adherend. Immediately 
spread the adhesive evenly over the bonding area using the clean prepared face of a second adherend and 
bring the two surfaces  into contact b) means of the alignment jig. Apply a pressure of 35 kPa, equivalent to a 
mass of 1.115 kg for this joint configuration, to the bond. It is permissible to remove the mass from the jig after 
five minutes to make repeat specimens. Once the req uired number of specimens have been assembled, leave 
the weight on the bonded area for the duration of cure.  
A.4.3  The correct quantity of adhesive is such that a small excess is forced out around the joint. Remove 
this excess, taking care not to upset the  alignment whilst maintaining the pressure exerted by the weight. 
Prepare  
A.5 Conditioning and testing  
A.5.1  Conditioning  
Leave the assembled joints under pressure in the alignment jig and maintain the assemblies at 15⁰C – 25⁰C for 
24 h.  
NOTE: Since moistu re catalyses the chemical reaction involved in bond formation, the curing time can be affected by the 
humidity of the air at the time of test.  
A.5.2  Testing  
A.5.2.1  Locate the assembly symmetrically in the testing machine with each grip (50 mm ± 20 mm) from 
the nearest edge of the overlap. Ensure that the longitudinal force applied by the machine acts in the plane of 
the bond plane by using packing pieces or other methods. When testing a double overlap joint, in order to 
avoid distorting the adherends, plac e a packing piece within the grips between the adherend. Set the machine 
in motion. Operate the machine so that the test joint is subjected to either:  
a) a force that increases at a constant rate; or  
b) a constant rate of separation;  
Such that in either case the  joint is broken in a period (65 s± 20s).  
NOTE 1: The machine should be operated under substantially constant conditions throughout the test although a load 
displacement diagram may indicate non -linearity at the commencement and end of the test.  
NOTE 2: If  no previous experience is available for the type of the joint under test, preliminary tests should be carried out to 
establish suitable operating conditions.  
NOTE 3: Because of the differing moduli of different adhesives, extra specimens might need to be manufactured in order 
to determine the precise conditions that will give the required time lapse.  
A.5.2.2  Record the highest force during rupture as the breaking force of that specimen. Discard results 
from test specimens that show starved joints or that r upture in the adherend, unless the test has been 
conducted to assess compliance with a minimum requirement that has been met or exceeded. Record the 
mode of failure in accordance with ISO 10365.  DUS 2449 : 2021  
6 © UNBS 2021  – All rights reserved  
 A.6 Expression of results  
Report results. The mean of six det erminations shall be expressed as the breaking shear stress in 
megapascals (MPa).  DUS 2449 : 2021  
© UNBS 2021  – All rights reserved  7 
 Annex C  
(normative)  
 
 
C.1 Principle  
The method is designed to determine the rapid setting properties of cyanoacrylates by preparing specimens 
as described in Annex B and asse ssing the strength after five minutes.  
C.2 Procedure  
Follow the procedure of B. 2 through to B. 4. Assemble an individual specimen as described in A.4, apply the  
weight for five minutes, remove from the jig and immediately test in accordance with B.5.2. T est a maximum of  
six specimens.  
C.3 Acceptance criteria  
The rapid setting property is satisfactory if three successive joints tested have a bond strength of not less than  
2.4MPa  DUS 2449 : 2021  
8 © UNBS 2021  – All rights reserved  
 Bibliography  
[1] IS 852: 1994, Animal glue for general wood -working purposes - Specification  
[2] IS 12994 (1990): Epoxy adhesives, room temperature curing — General purpose  
[3] IS 13254: 1992, Animal glue for match industry – Specification  
[4] TBS/CDC 7(5420) P3 , Adhesives — Ethyl and methyl cyanoacrylate – Specification  
 DUS 2449: :2021  
© UNBS  2021  – All rights reserved  9 
 Certifica tion 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 relati on 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 product s 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.  
 
 DUS 2449: : 2021   
 
ICS 71.100.70 
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© UNBS 2021 – All rights reserved