DEAS 850: 2023 
ICS 87.040  
 
© EA C 2023                                                                                                                         second  Edition 2023 
 DRAFT EAST AFRICAN STANDARD  
Matt solvent -borne paint for interior and exterior use — Specification  
EAST AFRICAN COMMUNITY  DEAS 85 0: 2023 
ii © EAC  2023 – All rights reserved  
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 DEAS 850: 2023 
© EAC 2023 – All right s reserved  iii 
 Foreword  
Development  of the East African Standards has b een necessitated by the need for harmonizing requirements 
governing quality of products and services in the East African Community. It is envisaged tha t through 
harmonized stan dardization, trade barriers that are encount ered when goods and services are exc hanged 
within the Community w ill be removed.  
The Community has established an East African Standards Committee  (EASC)  mandated to develop and 
issue Ea st African Standards  (EAS ). The Committee is composed of representati ves o f the National 
Standards Bodies  in Partner States, together with the representatives from the public and private sector 
organizations  in the community .  
East African Standards are de veloped through  Technical  Committees that are representative of key 
stakeh olders including government, ac ademia, consumer groups, priv ate sector and other interested parties. 
Draft East African Standards are circulated to stakeholders through the National Standards Bodies in the 
Partner States. The comments received are dis cusse d and incorporated before final ization of standards, in 
acco rdance with the Principles and procedures for development of East African Standards . 
East African Standards are subject to  review, to keep pace with technological advances. Users of the East 
African Standards are therefore expe cted to ensure that they alwa ys have the latest versions of the standards 
they are implementing .  
The committee responsible for this document is Techni cal Committee EASC/TC 070, Paints, vanishes and 
related products . 
This second edition  cancels and replaces the first edition  (EAS  852:2016), which has been technical ly revised.  
Attention is drawn to the possibility t hat some of the elements of this document may be subj ect of patent 
rights. EAC shall not be held responsi ble for i dentifying any or all such patent rights . 
 
  DRAF T EAS T AFRICAN STANDARD  DEAS 85 0: 2023 
 
© EAC 2023 – All rights reserved  1 
 Matt solvent -borne paint for interior and exterior use — 
Specification  
1 Scope   
This Draft East African Standard specifies requirements, sampling and test methods for matt solvent -borne 
paint intended for interi or and exterio r use . 
2 Normative references   
The following documents are ref erred to in the text in s uch a  way t hat some or all of their con tent constitutes 
requiremen ts of this  document.  For dated references, only the edition cited applies. For undated re ferences, 
the latest edition of the referenced document (in cluding any amend ments) applies.  
ISO 1524, Paints, var nishes and printing ink — Determination of fineness of  grind    
ISO 2813, Paints and varnishes — Determination of gloss value at 20 degrees, 60 degrees and 85 degrees   
ISO 2884 (all parts), Paints and varnishes — Determi nation of viscosity using rota ry visc ometers   
ISO 3251, Paints varnishes and plastics — Determination of non - volatile matter content   
ISO 461 8, Paints and varnishes — Terms and d efinitions  
ISO 6503 , Paints and Varnishes - Determinatio n of Tot al Lead - Flame Atomic Absorption Spectrometric 
Method   
ISO 6504 -3, Paints and varn ishes — Determination of hiding power — Part 3: Determination of contras t ratio 
of light coloured paints at a  fixed spreading rate  
ISO 9117 -3, Paints and varnishes — Drying t est — Part 3: Surface drying test using Ballotini  
ISO 9117 -4, Paints and varnishes — Drying tests — Part 4: Test using a mechanical recorder  
ISO 15528,  Paints, varnishes a nd raw materials f or paints and varnishes — Sampling  
3 Terms and defi nitions   
For the purposes of this document , the terms and definitions given in I SO 4618 apply .  
ISO and IEC maintain terminological databases fo r use in s tandardization at  the following addres ses: 
— ISO On line browsing platform: available at http://ww w.iso.org/obp   DEAS 850: 2023 
2 © EAC  2023 – All rights reserved  
 4 Requirements  
4.1 Genera l requirements  
4.1.1  Condition of the paint in the container  
The pa int shall be free fr om gel, coar se particles, foreign ma tter a nd skin and shall be in such a condition that 
at the time of deliver y by stirring produces a homogenous product of uniform consistency  
4.1.2 Finish  
When two coats of paint are applie d at a mi nimum of 12 h interval to a test panel of paper -faced plasterboar d, 
the film when dry sh all be of uniform colour and appearance with a matt finish .   
4.2 Specific requirements  
The Matt solvent -borne pai nt shall comply with the specif ic requirements given  in Table 1 when tested  in 
accordance with the methods the rein. 
Table 1 — Specific requirements for matt  solvent -borne paints  
S No.  Parameter  Requirement  Test met hod  
(i)  Fineness of grind, µm, max.  25  ISO 1524  
ii Fastness to light  To pass the test  Annex A  
iii Brushing prop erties   To pass the test  Anne x B 
iv Rolling properties  To pass the test  Anne x C 
v  Solids cont ent, %m/m, min.  50  ISO 3251  
vi  Skin formation  To pass the test  Annex D  
(vii)  Viscosity, KU  80-100 a)  ISO 288 4  
(viii)  Drying times at 25  ºC ± 2 ºC, h:  
• Surface dr ying time , max  
• Hard drying time     
3  
4 - 12  ISO 9117 -3  
ISO 9117 -4 
(ix)  Gloss b), %, max.  8  ISO 2813  
(x)  Opac ity, contrast ratio, %, min.  90  ISO 6504 -3  
(xi)  Resistance to w ashing, gloss 
change, max.  4  Annex  E  
(xii)  Resistance to yellowing (dark  
chamber) (for white paints only) 
on grey scale, max.  8  Annex F  
(xiii)  Total lead content, ppm, max.  90 ISO 6503  
 
a)  When using a rotating paddle viscome ter, results for viscosity  are dependent on the spindle 
numb er and the speed of the spin dle. 
  
b)  After drying for 16 h and tested using a 60º head gloss meter.  
 DEAS 85 0: 2023 
© EAC 2023 – All right s reserved  3 
 5 Pack aging  
The paint shall be packaged in a suitable container that prevents i t from deterioration during storage, 
transportation and normal handling  
6 Labelling  
6.2.1 The l abelling shall be eit her in Engli sh, Kiswahili or French or in combinati on as agreed between the 
manufacturer and the supplier. Any other languag e shall be optional.  
6.2.2  The paints shall be packaged in containers that are legibly and indelibly marked wi th the following 
information: the name of the product as “Matt solvent -borne  paint”;  
a) manufacturer’s name and  physica l address /or registered trade m ark;  
b) indication of colour/colou r code;  
c) date of manufacture;  
d) net content;  
e) batch/code numbe r;  
f) country of origin;  
g) expiry date  or best before date;  
h) instructions for use and safety  precautions .   
i) storage conditions ; and   
j) disposal instructions . 
7 Sampling  
Sampling  shall be done in accordance with ISO 15528.  DEAS 850: 2023 
4 © EAC  2023 – All rights reserved  
 Annex  A 
(normative)  
 
Fastness to light test  
A.1 Appara tus  
A.1.1  Test pa nels, two sealed cardboard panel s, ea ch 10 cm x 5 cm  
A.1.2  Geometr ic grey scale, for assessing colour change  
A.2 Procedure  
Coat the panel and air -dry for 24 h. Fix one pane l approximately 2 cm from a  clean window pane, using a 
suitab le adhesive tape, w ith the painted side facing the glass . The pane shall be of common, transparent 
window glass, approximately 2 mm thick, and shall be vertical, facing a d irection unshaded by bu ildings and 
trees.  
Place t he other panel in darkness, for ex ample, in a closed black envelope. After 28 days, m easur e the 
contrast between the pane ls using the Geometric Grey scale . 
A.3 Results  
There sha ll be no visible difference between the two pane ls. DEAS 85 0: 2023 
© EAC 2023 – All right s reserved  5 
 Annex  B 
(normative)  
 
Brushing properties test  
B.1 Apparatus  
B.1.1  Brush , a good  quality pure bristle brush for pai nt, 4 cm - 6 cm wid e  
B.1.2  Test panel , paper -faced plasterboard panel  not smalle r than 50 cm x 50 cm, placed vertically or 
nearly so and rigidly held (for example, fixed to a solid backing) to prevent movement du ring tes ting  
B.2 Procedure  
Wet the brush with the paint prop erly and appl y the paint to the test panel by criss  cross stro kes across a 
section of the panel and then, where appropriate, lay off the coat with vertical strokes using th e tip of the 
brush. Co at the n ext section in the same manner and continue this proce dure until th ree quarters of the panel 
is covered a s evenly as  practicable, noting the ease or difficulty of lapping until the whole panel is coated.  
During application, n ote such properties as  the bru shing, flowing, spreading levelling  and setting up of the 
paint. Al low the film to dry for 24 h and exami ne test are a of lapping and that adjacent for differences in gloss 
and/or other defects . 
B.3 Results  
The paint film when dry shall not show signs of sa gging, running or streaking, and s hall be free from brush 
marks . DEAS 850: 2023 
6 © EAC  2023 – All rights reserved  
 Annex C 
(normative)  
 
Rolling pro perties test  
C.1 Appara tus  
C.1.1   Roller coater , of size 10 cm - 15 cm  
C.1.2   Comm ercial roller tray   
C.1.3  Test panels , paper -faced plasterboar d panels not smaller than 1 m x 1 m, placed ver tically or nearly 
vertically and rigidly held to prevent moveme nt during the test  
C.2 Procedure  
C.2.1   Saturate the roller with paint using the r oller tray. Remove the excess paint b y rolling on t he 
subsidia ry panel. App ly paint to a section of the test panel.  
C.2.2  Continue the steps in C.2.1 until three quarters of the panel is covered  evenly, noting the ease or 
difficulty of lapping until the w hole panel is coated.  During applica tion, note suc h propertie s as rolling,  
flowing, spreading, levelling, bu bbling, dripping, clogging and fl y-off.  
C.2.3  Allow the film t o dry for 24 h and exa mine the area of lapping and that adjacent for differences in  
gloss and/or other defects.  
C.3 Result s 
The paint shall show no rolling, s preading, levelling and lappi ng propert ies with no more than slig ht tra nsient 
bubbling, dri pping, clogging or flay -off of paint from the roller.  
 DEAS 85 0: 2023 
© EAC 2023 – All right s reserved  7 
 Annex  D 
(normative)  
 
Examination  of skin formation  
D.1 Apparatus  
D.1.1  Container , one metal container of 250  mL with a tight -fitting lid  
D.1.2 Spatula   
D.2 Test condition s  
The test shall be carried out at a temperature of  25 °C ± 1 °C and a relative humidity of 65 % ± 2  %.  
D.3 Procedure  
Pour 125 mL - 130 mL of the paint into the container, place the lid on t ightly and momentarily inver t the 
container to seal the lid. Allow the container to stand upright for seven days.  Open the container and test the 
surface of the pai nt with a s patula for any skin formation.  Examine the walls and the lid for the presence of  
skin. DEAS 850: 2023 
8 © EAC  2023 – All rights reserved  
 Annex  E 
(normative)  
 
Resistance to was hing te st 
E.1 Principle  
The paint to be tested is applied to the te st panels. After drying and conditioning, the paint  films are 
mechanically washed over a specified number of cycles with a sponge, soaked in so ap solution. The 
resistance  of the paint  film to wa shing is assessed, particularly in respect to changes in colo ur and gloss, by 
comparing it to unwashed control f ilm.  
E.2 Apparatus  
E.2.1  Paint washable machine,  (see Figure E.1), consisting essentially o f a mechanism which impart s a 
lengthwise reciprocat ing motio n to a metal box fitted with  a sponge, across the su rface of a fixed test panel.  
The total mass of the  dry sponge  and its metal box shall be 45.0 g ± 15 g.  The reciprocating mechanism shall 
not impart any vertical force to metal box.  
The length  of strok e of the sponge over the test surface shall be about  30 cm.  
A constant rate of travel of the sponge ov er the test  surface shall be maintained in the range of 30 cycles/min - 
40 cycles/min.  
  
Figure E.1 — Wet abrasion tes ter  
  
E.2.2   Sponge , a pre-shrun k sponge cut to a dry size of approximate dimensions  10 cm x 7.5 cm x 4 cm  DEAS 85 0: 2023 
© EAC 2023 – All right s reserved  9 
 E.2.3  Drip feed , a constant  drip of so ap solution shall be applied to the test surface throughout the test 
period on an area which will not be used  for gloss measurements   
E.2.4  Paint applicator,  having a gap of approximately 100 µm  and producing paint films approximately 12 
cm wide   
E.2.5  Geometric grey scale  
E.3 Soap solution  
A 5 g/L solution of anhydrous sodium oleate made up with distilled wate r of deionized water of equal pur ity will 
be required.  
E.4 Test conditions  
The test  shall be carried out at a temperature of 25 °C ± 1 °C and a  relative humidity of 65 % ± 2 %.  
E.5 Test panels  
Two test panels made of tin plat e will be required. The test panel to be used fo r the was hability testing (Panel 
A) shall have typical dimens ions of 15 cm x 45 cm and the control panel (Panel B) shall ha ve dimensions not 
less than 15 cm x 25 cm.  
E.6 Preparation of panel s  
Place the pane ls on a flat surface. Ap ply a film of paint to t he panels  by means of the applicator. Air -dry the 
panels for 24 h. Allow the  panels to stand upright for seven d ays.  
E.7 Procedure  
E.7.1  By use of a gloss meter, measure the specular gloss  of Panel A using a 85º exposure head when  the 
60º gloss of the pa int is le ss than 30.  
E.7.2  Secure panel A in the tray of the  washability apparatus and adjust the drip feed so that the so ap 
solution falls onto the test s urface at a rate of 0.5 mL/min - 0.75 mL/min (approx imately 10 drops/min - 15 
drops/min).  
E.7.3  Soak the spo nge in distilled water or deionized water for 5 min,  remove from the water and squeeze, 
with one hand, until no wa ter drips from the sponge.  
E.7.4  Pour 50 mL of the soap solution uniformly over the sponge and attach the we t sponge to the metal 
box, minimi zing solution loss.  
E.7.5  After ensuring that the attached counting device has been set to zero, star t up the ma chine.  
E.7.6    After 500 cycles, turn the machine off and remove panel A from the ap paratus.  
E.7.7   Rinse p anel A under running tap  water fo r 1 min and then give it a final rinse with distille d or 
deinonized water. Allow it to stand vertically  under ambi ent conditions for 2 h.  
E.7.8   At the end of this time, inspect the panel, noting an y signs of integrity f ailure.  
E.7.9   Measure the gloss  on the washed surface of Panel A using the same geo metry as was used in the 
original measurement.  DEAS 850: 2023 
10 © EAC  2023 – All rights reserved  
 E.7.10  Compar e the colour of the washed area of Pa nel A with that of Panel B using the geometric gre y 
scale  DEAS 85 0: 2023 
© EAC 2023 – All right s reserved  11 
 Annex  F 
(norma tive) 
 
Yellowing resista nce test  
F.1 Apparatus  
F.1.1  Container , light -proof containe r such that the painted panels stored therein have free access  to air, 
e.g., a ventilated locked drawer.  
F.1.2  Panels , sealed white cardboard of dim ensions not smaller th an 10 cm x 50 cm.  
F.1.3  Artifici al daylight unit , having two sources of illumination .  The daylight source shall have a 
correlated colo ur temperat ure of 6 300 K – 7 500 K and the incandescent source shall have a colour 
temperature of  2 300 K – 3 000 K. The illumination in the vi ewing are a shall be between 1 000 lux  – 1 750 lux 
and the int ernal surroundings of the cabinet shall have the Mu nsell neutr al grey colour N6 to N7.  
F.1.4 Geometric grey scale , for assessing degree of staining.   
F.2 Test conditions  
The test shall be carri ed out at  a temperature of 25 o C ± 1  o C and a relative humi dity of 65 % ± 2 %.  
F.3 Preparation of test panels   
F.3.1  Apply three coats of the paint at a recoating interval of 1 h.  Retain some paint for the preparation of 
control  test panels.  
F.3.2   Allow the f inal coat to dry for 24 h in conditions specified in  Clause F.2.  
F.4 Procedure  
F.4.1   Place the panel s in the li ght-proof container and store for 28 days.  
F.4.2  From the retained paint, prepare test  panels as in Clauses F.3.1 and F.3.2, such that the en d of the 
drying interval for the final coat coincide s with the end of the storage period.  
F.5 Assessme nt of yello wing  
Place the panels of the stored and freshly prepared paint film side by side in th e same plane and the g rey 
scale in the adjac ent positio n in the same plane.  Examine under the artificial d aylight unit.  Rate the degree of 
the stored film f rom ten to zero by doubling the corresponding grade on the grey scale.  DEAS 850: 2023 
12 © EAC  2023 – All rights reserved  
 Bibliography  
EAS 850:2016, Matt solvent -borne paints for interior and exterio r use — Specification  
 
 EAS 85 0: 2023   
 
© EAC 2023 – All rights reserv ed