PUBLIC REVIEW DRAFT DRAFT UGANDA 
STANDARD  
  DUS DEAS 849 
 
Seco nd Edition  
2019-mm-dd 
 
 Reference number  
DUS DEAS 849: 2019  
 
© UNBS 2019 
   
Silk (sheen) emulsion paint for interior use — Specification  
 
 PUBLIC REVIEW DRAFTDUS DEAS 849: 2019  
ii                © UNBS  2019 - 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 
respo nsible for its correct application  
© UNBS 2019  
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 p rior 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 7 333 2 50/1/2 
Fax: +256 41 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  
 PUBLIC REVIEW DRAFTDUS DEAS 849: 2019  
© UNBS  2019 - 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 Organisatio n for Standardisation (ISO),  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Poi nt 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 represen tatives 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 co mments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
This Uganda Standard, US EAS 849: 2019 , Silk (sheen) emulsion paint for interior use — Specification , is 
identical with and h as been reproduced from an East African  Standard, EAS 849: 2019 , Silk (sheen) emulsion 
paint for interior use — Specification , and adopted  as a Uganda Standard.  
The committee responsible for this document is Technical Committee UNBS/TC 5 , Chemicals and 
Environment , Subcommittee SC 2 , Paints, varnishes and related products . 
This second edition cancels and replaces the first edition ( US EAS 849:2016 ), which has been technically 
revised.  
Wherever the words, “ East African  Standard " appear, they should be repl aced by "Uganda Standard."   DEAS 849: 2019  
ICS 87.040  
© EAC 2019                                                                                                                         Second Edition 2019   
 
DRAFT EAST AFRICAN STANDARD  
 
Silk (sheen) emulsion paint  for interior use — Specification  
EAST AFRICAN COMMUNITY  DEAS 849: 2019  
ii © EAC 2019  – 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 2019  — 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  DEAS 849: 2019  
© EAC 2019  – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ .............................  v 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  1 
4 Requirements  ................................ ................................ ................................ ................................ .........  1 
4.1 General requirements  ................................ ................................ ................................ ...........................  1 
4.1.1  Composition  ................................ ................................ ................................ ................................ ...........  1 
4.1.2  Condition in the contai ner ................................ ................................ ................................ ....................  2 
4.1.2  Applica tion properties  ................................ ................................ ................................ ..........................  2 
4.2 Specific requirements  ................................ ................................ ................................ ...........................  2 
4.2.1  Thinning  ................................ ................................ ................................ ................................ .................  2 
4.2.3  Resistance to accelerated weathering  ................................ ................................ ................................  2 
4.2.4  Fungal resistance  ................................ ................................ ................................ ................................ .. 2 
4.2.5  Gloss  ................................ ................................ ................................ ................................ .......................  2 
4.2.6  Colour  ................................ ................................ ................................ ................................ .....................  2 
4.2.7  Temperature stability at 20 °C ................................ ................................ ................................ ...............  2 
5 Weights and measures  ................................ ................................ ................................ .........................  3 
6 Packaging, labelling and marking  ................................ ................................ ................................ ...... 3 
6.1 Packaging  ................................ ................................ ................................ ................................ ..............  3 
6.2 Labelling and marking  ................................ ................................ ................................ ..........................  3 
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 fungal  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 DEAS 849: 2019  
iv © EAC 2019  – All rights reserved  
 G.2 Apparatus  ................................ ................................ ................................ ................................ ............  12 
G.3 Reagents  ................................ ................................ ................................ ................................ ..............  12 
G.4 Procedure  ................................ ................................ ................................ ................................ ............  12 
Bibliography  ................................ ................................ ................................ ................................ .....................  14 
 
 DEAS 849: 2019  
© EAC 2019  – 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 sta ndardization, 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 E ast 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 s takeholders 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 .  
EAS 849 was prepared by Technical Committee EASC/TC 070, Paints, varnishes and related products . 
This second edition cancels and replaces the first edition ( EAS 849:2016 ) and amendment 1:2019,  which has 
been technically rev ised on the requirement of titanium dioxide content if used as a single opacifier.  
  DRAFT EAST AFRICAN STANDARD  DEAS 849: 2019  
 
© EAC 2019  – All rights reserved  1 
 Silk (sh een) emulsion paint  for interior use — Specification  
1 Scope  
This  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 5 91-1, 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 de grees  
ISO 3251, Paints varnishes and  plastics — Determination of non -volatile content  
ISO 6503 , Paints and varnishes — Determination of total lead — Flame atomic absorption spectrometric 
method”. ISO 4618, Paints and varnishes — Terms and definitions  
ISO 65 04-3, 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 document , the terms and definitions given in ISO 4618 apply . 
4 Requirements  
4.1 General requirements  
4.1.1 Composition  
4.1.1.1  The pain t 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 .  DEAS  849: 2019  
2 © EAC 2019  – All rights reserved  
 4.1.1.2  It shall contain  a suitable le vel 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 contai ner 
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 suita ble 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 homogene ous state.  The foaming, if any, shall dissipate 
rapidly.  
4.2.2 Recoating properties  
When tested in accordanc e 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 Fung al resistance   
When tested in accordance with Annex B , paint panels shall  be free from surface funga l growth.  
4.2.5 Gloss  
When tested in accordance wit h 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 co lour 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.  DEAS  849: 2019  
© EAC 2019  – All rights reserved  3 
 4.2.8 Additional  specific  requirements  
The paint shall comply with the quality requireme nts specified in Table 1 when tested in accordance with the 
methods therein.  
Table 1  — Specific requirements for silk (sheen) 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 , hours , max.   
 Hard  drying time , at 25 oC ± 2 
ºC, hours, max.   
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),used 
as single opacifier,  min. 15 ISO 591 -1 
(x)  Lead cont ent, ppm, max.  90 ISO 6503  
 
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. 
6 Packaging , labelling  and marking  
6.1 Packaging  
The paint shall be packaged in a sui table 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 t he 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:  DEAS  849: 2019  
4 © EAC 2019  – All rights reserved  
 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 manu facture; 
e) net content;  
f) batch/code number ; 
g) country of origin ; 
h) expiry date or best before date ; and  
i) instru ctions 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.  
 DEAS  849: 2019  
© EAC 2019  – 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 sti r the paint without dipping the hands into the paint  
A.2 Procedure  
Suitably thin the pain t 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 coatin g is applied.  
 
Figure A.1 — Suitable method of step coating  
 
DEAS  849: 2019  
6 © EAC 2019  – 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 t he 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 suita ble 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  
 
DEAS  849: 2019  
© EAC 2019  – All rights reserved  7 
 DEAS  849: 2019  
8 © EAC 2019  – All rights reserved  
 Annex C  
(normative)  
 
Determination of colour  
C.1 Principle  
The colou r 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.  DEAS  849: 2019  
© EAC 2019  – All rights reserved  9 
 Annex  D 
(normative)  
 
Determination of temperature stability  
D.1 Principle  
The p aint 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 º C 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 .  DEAS  849: 2019  
10 © EAC 2019  – All rights reserved  
 Annex E  
(normative)  
 
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 p aint 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 .  
 
 DEAS  849: 2019  
© EAC 2019  – 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 ad d 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.  
 DEAS  849: 2019  
12 © EAC 2019  – All rights reserved  
 Annex G 
(normative)  
 
Determination of r esistance 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 Appa ratus  
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 o f 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 hors e 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 º C ± 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 a nd 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 fo r any defects and note the number of oscillations when 
these defects start showing.  DEAS  849: 2019  
© EAC 2019  – All rights reserved  13 
  
Figure G.1 — Wet abrasion teste r 
 
DEAS  849: 2019  
14 © EAC 2019  – All rights reserved  
 Bibliography  
KS 811:2013, Silk (sheen) emulsion paints for interior and exterior use — Specification  
€DEAS 849: 2019    
 
© EAC 2019  – All rights reserved