DRAFT UGANDA STANDARD  
  DUS EAS 849 
First  Edition  
2015-mm-dd 
 
 Reference number  
DUS EAS 849: 2015 
© UNBS 201 5 
  
Silk (sheen) emulsion paint for interior use — Specification  
 DUS EAS 849:2015 
ii                © UNBS  2015 - 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 2015 
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 41 505 995 
Fax: 256 41 286 123 
E-mail: unbs@infocom.co.ug  
Web: www.unbs.go.ug  
 DUS EAS 849:2015 
© UNBS  2015 - All rights reserved                iii National 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 representatives of 
consumers, traders, academicians, manufacturers, government and other stakeholders. 
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.  
This Draft Uganda Standard, DUS EAS 849: 2015 , Silk (sheen) emulsion paint for interior use — 
Specification , is identical with  and has been reproduced from an East African  Standard , EAS 849: 2015, Silk 
(sheen) emulsion paint for interior use — Specification , and is being proposed for adoption  as a Uganda 
Standard.  
 
Wherever the words, “ East African Standard" appear, they should be replaced by "Uganda Standard."  
   FDEAS 849: 2015 
ICS 87.040  
© EAC 2015                                                                                                                              First Edition 2015  
 
FINAL DRAFT EAST AFRICAN STANDARD 
 
Silk (sheen) emulsion paint for interior use — Specification 
EAST AFRICAN COMMUNITY  FDEAS 849: 2015  
ii © EAC  2015  – All rights reserved  
 Copyright notice 
This EAC document is copyright-protected by EAC. While the reproduction of this document by 
participants in the EAC standards development process is permitted without prior permission from EAC, 
neither this document nor any extract from it may be reproduced, stored or transmitted in any form for 
any other purpose without prior written permission from EAC. 
Requests for permission to reproduce this document for the purpose of selling it should be addressed 
as shown below or to EAC’s member body in the country of the requester:  
© East African Community 2015  — All rights reserved 
East African Community  
P.O.Box 1096 
Arusha 
Tanzania 
Tel: 255 27 2504253/8 
Fax: 255 27 2504481/2504255 
E-mail: eac@eachq.org 
       Web: www.eac -quality.net  
Reproduction for sales purposes may be subject to royalty payments or a licensing agreement. 
Violators may be persecuted FDEA S 849: 2015  
© EAC 2015  – All rights reserved  iii 
 Contents Page 
Foreword .............................................................................................................................................................  v 
1 Scope  ................................ ................................ ................................ ................................ ...................... 1 
2 Normative references  ................................ ................................ ............................................................  1 
3 Terms and definitions  ................................ ................................ ...........................................................  1 
4 Requirements  ................................................................ ................................ ................................ ......... 2 
4.1 Gene ral requirements  ................................ ................................ ...........................................................  2 
4.1.1  Composition  ................................................................ ................................ ................................ ........... 2 
4.1.2  Condition in the contai ner ................................ ................................ ................................ .................... 2 
4.1.3  Thinning  ................................ ................................ ................................ ................................ ................. 2 
4.1.4  Application properties  ................................ ................................ ..........................................................  2 
4.2 Specific requirements  ................................ ................................ ...........................................................  2 
4.2.1  Resistance to accelerated weathering  ................................ ................................................................  2 
4.2.2  Fungus resistance  ................................ ................................................................ ................................ . 2 
4.2.3  Gloss  ................................ ................................ ................................ ................................ ....................... 3 
4.2.4  Colour  ................................ ................................ ................................ ................................ ..................... 3 
4.2.5  Temperature stability at 20 °C ................................ ................................ ................................ ............... 3 
5 Weights and measures  ................................ ................................ ................................ ......................... 3 
6 Packaging, labelling and marking  ................................................................ ................................ ...... 4 
6.1 Packaging  ................................ ................................ ................................ ................................ .............. 4 
6.2 Labelling and  marking  ................................ ................................ ..........................................................  4 
7 Sampling  ................................ ................................ ................................ ................................ ................ 4 
8 Quality of reagents  ................................ ................................ ................................................................  4 
Annex A (normative)  Determination of recoating properties ........................................................................ 5  
A.1 Apparatus  ................................ ................................ ................................ ................................ ............... 5 
A.2 Procedure  ................................ ................................ ................................ ................................ ............... 5 
Annex B (normative)  Determination of fungus resistance ............................................................................ 6  
B.1 Principle  ................................ ................................ ................................ ................................ ................. 6 
B.2 Apparatus  ................................ ................................ ................................ ................................ ............... 6 
B.3 Procedure  ................................ ................................ ................................ ................................ ............... 6 
Annex C (normative)  Determination of colour ...............................................................................................  8 
C.1 Principle  ................................ ................................ ................................ ................................ ................. 8 
C.2 Procedure  ................................ ................................ ................................ ................................ ............... 8 
Annex D (normative)  Determination of temperature stability  ................................ ................................ ....... 9 
D.1 Principle  ................................ ................................ ................................ ................................ ................. 9 
D.2 Procedure  ................................ ................................ ................................ ................................ ............... 9 
Annex E (normative)  Determination of the quantity of material  ..............................................................  10 
E.1 Apparatus  ................................ ................................ ................................ ................................ ............. 10 
E.2 Procedure  ................................ ................................ ................................ ................................ ............. 10 
E.3 Calculation  ................................................................ ................................ ................................ ........... 10 
Annex F (normative)  Determination of pH  ................................................................ ................................ . 11 
F.1 Apparatus and materials  ................................ ................................ ................................ .................... 11 
F.2 Principle  ................................ ................................ ................................ ................................ ............... 11 
F.3 Procedure  ................................ ................................ ................................ ................................ ............. 11 
Annex G (normative)  Determination of resistance to wet abrasion  ................................ ................... 12 
G.1 Principle  ................................ ................................ ................................ ................................ ............... 12 FDEAS 849: 2015  
iv © EAC  2015  – All rights reserved  
 G.2 Apparatus  ................................ ................................ ................................ ............................................  12 
G.3 Reagents  ................................ ................................ ................................ ..............................................  12 
G.4 Procedure  ................................ ................................ ................................ ............................................  12 
Bibliography .....................................................................................................................................................  14 
 
 FDEA S 849: 2015  
© EAC 2015  – All rights reserved  v 
 Foreword 
Development of the East African Standards has been necessitated by the need for harmonizing requirements 
governing quality of products and services in the East African Community. It is envisaged that through 
harmonized standardization, trade barriers that are encountered when goods and services are exchanged 
within the Community will be removed.  
In order to achieve this objective, the Community established an East African Standards Committee mandated 
to develop and issue East African Standards.   
The Committee is composed of representatives of the National Standards Bodies in Partner States, together 
with the representatives from the private sectors and consumer organizations. Draft East African Standards 
are circulated to stakeholders through the National Standards Bodies in the Partner States. The comments 
received are discussed and incorporated before finalization of standards, in accordance with the procedures 
of the Community. 
East African Standards are subject to review, to keep pace with technological advances. Users of the East 
African Standards are therefore expected to ensure that they always have the latest versions of the standards 
they are implementing .  
FDEAS 849 was prepared by Technical Committee EASC/TC 07 0, Paints, varnishes and related products . 
 FINAL DRAFT EAST AFRICAN STANDARD  FDEAS 849: 2015  
 
© EAC 2015  – All rights reserved  1 
 Silk (sheen) emulsion paint for interior use — Specification 
1 Scope 
This Final Draft East African Standard specifies requirements, sampling  and test  methods for silk (sheen) 
emulsion paint  for interior use.  
2 Normative references 
The following referenced documents are indispensable for the application 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. 
EAS 31,  Laundry soaps — Specification  
ISO 591- 1, Titanium dioxide pigments for paints — Part 1: Specifications and methods of test  
ISO 2811, (all parts), Paints and varnishes — Determination of density  
ISO 2813, Paints and varnishes — Determination of gloss value at 20 degrees, 60 degrees and 85 degrees  
ISO 3251, Paints varnishes and  plastics — Determination of non- volatile content  
ISO 3856- 1, Paints and varnishes — Determination of soluble metal content — Part 1: Determination of lead 
content — Flame atomic absorption spectrometric method and dithizone spectrophotometric method 
ISO 4618, Paints and varnishes — Terms and definitions  
ISO 6504-3, Paints and varnishes — Determination of hiding power — Part 3: Determination of contrast ratio 
of light coloured paints at a fixed spreading rate  
ISO 9117-3,  Paints and varnishes — Drying test — Part 3: Surface drying test using Ballotini  
ISO 15528, Paints , varnishes and raw materials for paints and varnishes — Sampling  
3 Terms and definitions 
For the purposes of this standard, the terms and definitions given in ISO 4618 shall apply .  
2 © EAC  2015  – All rights reserved  
 4 Requirements 
4.1 General requirements 
4.1.1 Composition 
4.1.1.1 The paint shall be a medium consisting of any stable synthetic polymer emulsion in water 
containing pigments and suitable ingredients as may be necessary to produce a paint so as to satisfy the 
requirements of this standard.  
4.1.1.2 It shall contain a suitable level of an effective non-mercurial or non-phenolic fungicide approved 
by an authorised organisation of the country. The level used should not render the finish or its film hazardous 
to health. 
4.1.2 Condition in the contain er 
4.1.2.1  The paint shall: 
a) have n o irritating or offensive odour; 
b) be free from lumps, skins; and 
c) be free from corrosion,  mould and petrification. 
4.1.2.2  The condition of the paint shall be such that settling, if any, shall be easily  incorporated by stirring . 
4.1.2  Application properties 
The paint shall be suitable for application by brush, spray, roller or a suitable applicator. The resulting film 
shall not show pigment flocculation, coarseness or other undesirable characteristics. 
4.2 Specific requirements 
4.2.1 Thinning 
Paints ready for use , if thinned, not more than 15 % (v/v) of water shall be used. The paint shall mix readily 
with a minimum amount of foaming to a smooth homogeneous state. The foaming, if any, shall dissipate 
rapidly. 
4.2.2 Recoating properties 
When tested in accordance with Annex A, all grades of the paint shall not show any lifting or softening of the 
underlying coat. It shall not exhibit colour separation, sagging, pitting, flaking or cracking. 
4.2.3 Resistance to accelerated weathering  
When tested in accordance with ISO 21207, the paint film shall not exhibit any flaking, cracking, chalking or 
colour fading.  
4.2.4 Fungal resistance   
When tested in accordance with Annex B, paint panels shall  be free from surface funga l growth.   
© EAC 2015  – All rights reserved  3 
 4.2.5 Gloss 
When tested in accordance with ISO 2813, the gloss level shall not be more than 45 % when dried for 2 h and 
not less than 20 % after further drying for 16 h at 60º gloss meter angle .  
4.2.6 Colour 
When tested in accordance with Annex C, the colour of the paint shall be as agreed betwe en the purchaser 
and the supplier 
4.2.7 Temperature stability at 20 °C 
When tested in accordance with Annex D, the paint shall be free from lumps,  skins  and settling.  
4.2.8 Additional specific requirements  
The paint shall comply with the quality requirements specified in Table 1 when tested in accordance with the 
methods therein. 
Table 1 — Specific requirements for matt emulsion paint 
S/ No.  Characteristic  Requirement  Test method  
(i)  Quantity of paint, %  of declared 
volume at 25 ºC ± 2 ºC, min.  ± 2 Annex E  
(ii)  Specific gravity at 2 5 ºC ± 2 ºC  1.2 – 1.3 ISO 2811  
(iii)  Opacity , % , min  90 ISO 6504 -3 
(iv)  Fineness of grind, µm, max.  20 ISO 1524  
(v)  Solids content, % (m/m), min.  50 ISO 11890 -1 
(vi)  Drying time:  
 Surface drying time, at 25 oC 
± 2 ºC , minutes, max.   
 Hard drying time, at 25 oC ± 2 
ºC, h, max.   
1 – 2 
2 – 4  
ISO 9117 -3 
(vii)  pH 8 – 9 Annex F  
(viii)  Resistance to wet abrasion, 
cycles, min.  5 000 Annex G  
(ix)  Titanium dioxide content, % (m/m) 
(if used for white p igments), min.  15 ISO 591 -1 
(x)  Lead content, ppm, max.  100 ISO 3856 -1 
 
5 Weights and measures 
The fill and volume of the paint, shall comply with Weights and Measures regulations of the respe ctive Partner 
State s.  
4 © EAC  2015  – All rights reserved  
 6 Packaging, labelling and marking 
6.1 Packaging 
The paint shall be packaged in a suitable container that prevents it from deterioration during storage, 
transportation and normal handling. 
6.2 Labelling and marking 
6.2.1 The labelling shall be either in English, Kiswahili or French or in combination as agreed between the 
manufacturer and the supplier. Any other language shall be optional. 
6.2.2 The paints shall be packaged in containers that are legibly and indelibly marked with the following 
information: 
a) the name of the product shall appear as ” Silk emulsion paint” ; 
b) manufacturer ’s name and/or registered trade mark; 
c) indication of colour/colour code; 
d) date of manufacture; 
e) net content; 
f) batch/code number; 
g) country of origin; 
h) expiry date or best before date ; and  
i) instructions for use and safety. 
7 Sampling 
Sampling shall be done in accordance with ISO 15528. 
8 Quality of reagents 
Analytical grade reagents and distilled water or deionized water shall be used for the appropriate tests.  
  
© EAC 2015  – All rights reserved  5 
 Annex A 
(normative) 
 
Determination of recoating properties 
A.1 Apparatus 
A.1.1 Aluminium metal , flat sheets of size 300 mm x 100 mm x 4 mm 
A.1.2 Soft hair brush , a clean soft hair brush with a width of about 1 cm and a hair length of about 2 cm 
A.1.3 Glass stirrer  long enough to stir the paint without dipping the hands into the paint 
A.2 Procedure 
Suitably thin the paint where necessary and apply one coat of the paint onto a dry panel and leave to dry for 2 
h at ambient temperature. By a step-coating method, apply a second coat and examine for recoating 
properties after drying for 30 min. Figure A.1 shows how step coating is applied. 
 
Figure A.1 — Suitable method of step coating 
 
 
6 © EAC  2015  – All rights reserved  
 Annex B 
(normative) 
 
Determination of fung al resistance 
B.1 Principle 
Aluminium metal panel is evenly coated with two coats of the paint by brushing and then air-dried for a 
specified period. The panel is exposed on an exposure rack for a specified period and the intensity of fungal 
growth is observed. 
B.2 Apparatus 
B.2.1  Exposure rack shall usually support the panels at an angle of 45º to the horizontal. 
B.2.2 The rack shall be so situated that the specimens are not protected or overshadowed by neighbouring 
objects. 
B.2.3  The construction of the racks shall be such that the backs of the specimens are freely exposed to the 
atmosphere and such that water drainage does not occur from one panel to the other. 
B.2.4  Specimens shall not be in electrical contact with metals, nor as far as possible in direct contact with 
wood or other porous material.  A suitable method of mounting panels is shown in Figure B.1. If panels are 
supported in grooves, the suitable drainage holes shall be provided to prevent accumulation of water. 
B.3 Procedure 
Apply two coats of the paint by brushing on a 300-mm x 150-mm x 4-mm clean, dry, aluminium panel with ½ h 
drying between coats.  The edges and back of the panels shall be coated with protective paint. Expose the 
panels on the exposure rack and examine the fungal growth on the panels monthly, for six months. 
Figure B.1 — Suitable method of mounting panels 
 
 
© EAC 2015  – All rights reserved  7 
  
8 © EAC  2015  – All rights reserved  
 Annex C 
(normative) 
 
Determination of colour 
C.1 Principle 
The colour of the paint applied on a white unglazed art paper is compared visually in diffused daylight with that 
of the standard. 
C.2 Procedure 
C.2.1  Apply the paint using a film applicator to give a wet film thickness of 50 μm on a 150 -mm x 150- mm 
white unglazed art paper. Air-dry the film for 4 h in a well ventilated room in a horizontal position. When the 
film is dry, apply a second coat of the paint to give again a combined wet film thickness of 50 mm and air dry. 
After 16 h, compare the colour of the film with that of the standard colour visually in diffused daylight. 
C.2.2  The paint shall be deemed to have passed the test if the colour of the paint matches with the 
standard colour.  
© EAC 2015  – All rights reserved  9 
 Annex D 
(normative)  
 
Determination of temperature stability  
D.1 Principle 
The paint is subjected to extremes of temperature and then tested for thinning and application properties. 
D.2 Procedure 
D.2.1  Fill two clean 500-mL metal containers with paint leaving the usual ullage and seal tightly. Keep one 
of the containers at 20 ºC ± 1 ºC and the other at 60 ºC ± 2 ºC for 48 h. Keep these two containers at room 
temperature for 24 h thereafter. Subsequently, examine the paint in the two containers. 
D.2.2  The paint shall be deemed to have passed this test if it is free from lumps, skins and settling.   
10 © EAC  2015  – All rights reserved  
 Annex E 
(norma tive) 
 
Determination of the quantity of material  
E.1 Apparatus 
E.1.1 Graduated measuring cylinder 
E.1.2 Empty container 
E.2 Procedure 
Measure out the volume of the paint by pouring it into the measuring cylinder and emptying the paint into an 
empty container. Measure out until all the paint is finished and record the total volume of the paint by adding 
up the volume. 
E.3 Calculation  
The measured volume shall be expressed as follows: 
% of volume measured is   
100
V1VV  
Where, 
V1 is the total measured volume; and 
V is the declared volume .  
 
  
© EAC 2015  – All rights reserved  11 
 Annex F 
(normative)  
 
Determination of pH  
 
F.1 Apparatus and materials 
F.1.1 Beaker, 150-ml 
F.1.2 pH meter with glass calomel electrodes 
F.1.3 Analytical balance 
F.1.4 Glass rod 
F.1.5 Distilled water 
F.2 Principle 
The paint is mixed with freshly boiled water to remove the carbon dioxide and the hydrogen ion concentration 
is measured using a pH meter. 
F.3 Procedure 
Weigh 5.00 g ± 0.01 g of the paint.  Place it in a 150-mL beaker and add 50 g, freshly boiled, distilled water.  
Mix well by means of a glass rod and cool to 23 ºC ± 2 ºC. Measure the pH with a pH meter using glass 
calomel electrode by carefully following the instructions of the meter. 
  
12 © EAC  2015  – All rights reserved  
 Annex G 
(normative)  
 
Determination of resistance to wet abrasion  
G.1 Principle 
The painted panels are subjected to wet rubbing in the abrasion test apparatus at a specified speed and load 
of the brush.  The panels are examined at the end of the stipulated oscillations for film defects. 
G.2 Apparatus 
Wet abrasion tester , as shown in Figure G.1 and having the following accessories: 
a) Washing unit, of such a construction as to hold the brush in a box or holder, which moves backwards 
and forwards in a straight line across the test panels at the rate of 38 ± 2 strokes per minute.  The 
trays shall be watertight to hold the panels; 
b) Brush a pad made out of polyurethane foam of density 25 kg/m3 and of size 85 mm x 36 mm x 12 mm.  
The total mass of the brush and the holder shall be 500 g; and 
c) Fractional horse power motor, of suitable speed to regulate the oscillations of the brush. 
G.3 Reagents 
Soap solution, dissolve 0.5 g of laundry soap complying with EAS 31 weighed to the nearest 0.001 g 
(previously dried at 105 ºC ± 2 ºC for 30 min) in distilled water to give 0.5 % (m/v) solution. 
G.4 Procedure 
G.4.1 To prepare the panel, clean a glass panel, 415 mm x 120 mm. Apply a coat of the undercoating 
enamel to give a wet film thickness of 35 µm - 38 µm and store at 120 ºC for 30 min. Rub down with an emery 
paper and wipe until the gloss is removed completely. 
Apply a coat of the paint by use of a brush or film applicator to give a wet film thickness of 150 µm. Allow this 
to air dry for 16 h. 
G.4.2  Dip the brush in distilled water at 25 ºC for 30 min. to a depth of 12 mm. Shake off excess water and 
soak in the soap solution for 5 min. Fix the painted test panel in the tray in position with painted surface 
upwards. Mix the brush in its holder, having a total load of 0.5 kg and adjust the stroke in such a way that not 
less than 10 mm of the film is left free on both ends. Start the oscillations of the brush. 
Keep the panel wet by adding soap solution at the rate of 10 to 12 drops per minute in the path of the brush. 
Wash with water, allow to dry, and examine the film for any defects and note the number of oscillations when 
these defects start showing.  
© EAC 2015  – All rights reserved  13 
  
Figure G .1 — Wet abrasion tester  
 
 
14 © EAC  2015  – All rights reserved  
 Bibliography 
KS 811:2013, Silk (sheen) emulsion paints for interior and exterior use — Specification  
€FDEAS 849: 2015    
 
© EAC 2015 – All rights reserved