PUBLIC REVIEW DRAFT DRAFT UGANDA STANDARD  
  DUS  
745:2018  
Second  Edition  
2018-mm-dd 
 
 
 Reference number  
DUS: 2018  
© UNBS 2018   
  
Road and runway marking paints — solvent-borne and water-
borne paints — Specification  
  
 PUBLIC REVIEW DRAFTDUS 745 : 2018 
ii © UNBS 2018  – 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 yyyy  
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: +256 414 333 250 /1/2/3 
Fax: +256 414 286 123 
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  PUBLIC REVIEW DRAFTDUS  745: 2018  
© UNBS 2018  – All rights reserved  iii 
 Contents Page 
Foreword ............................................................................................................................................................. v  
1 Scope  ................................ ................................ ................................................................ ...................... 1 
2 Normative reference  ................................................................ ................................ .............................. 1 
3 Terms and definitions  ................................................................ ................................ ........................... 2 
4 Types  ................................ ................................ ................................................................ ...................... 3 
5 Requirements  ................................ ................................ ................................................................ ......... 3 
5.1 General requirements  ................................................................ ................................ ........................... 3 
5.1.1  Condition in the container  ................................ ................................................................ .................... 3 
5.1.2  Storage stability  ................................ ................................ ................................ ..................................... 3 
5.1.3  Viscosity  ................................ ................................ ................................................................ ................. 3 
5.1.4  Application properties  ................................................................ ................................ .......................... 3 
5.1.5  Resistance to sagging (type 1, type 2 and type 3 paints)  ................................ .................................  4 
5.1.6  Hiding power  ................................ ................................ ................................................................ .......... 4 
5.1.7  Resistance to bleeding  ................................................................ ................................ ......................... 4 
5.1.8  Resistance to artificial weathering  ................................ ................................ ...................................... 4 
5.1.9  Resistance to abrasion (type 1, type 2 and type 3 paints  ................................ .................................  4 
5.1.10  Alkali resistance of paints for concrete surfaces  ................................................................ .............. 5 
5.1.11  Skid resistance (type 4 paints)  ................................ ................................................................ ............. 5 
5.1.12  Resistance to traffic wear  ................................ ................................................................ ..................... 5 
5.1.13  85° spec ular gloss  ................................................................ ................................ .................................  5 
5.1.14  Luminance factor (reflectivity)  ................................ ................................................................ ............. 5 
5.1.15  glass beads  ................................ ................................ ................................................................ ............ 5 
5.2 Colour  ................................ ................................ ................................................................ ..................... 5 
5.2.1  Red and yellow paint  ................................................................ ................................ ............................. 5 
5.2.2  Obliterating paint  ................................ ................................ ................................ ................................... 6 
5.3 Specific requirements  ................................................................ ................................ ........................... 6 
6 Packaging and Labelling  ................................ ................................................................ ...................... 6 
6.1 Packaging  ................................ ................................ ................................................................ ............... 6 
6.2 Labelling  ................................ ................................ ................................................................ ................. 7 
7 Sampling  ................................ ................................ ................................................................ ................ 7 
Annex A (normative)  Resistance to sagging .................................................................................................. 8  
A.1 Apparatus  ................................ ................................ ................................................................ ............... 8 
A.1.1  Float -glass panel, of superficial size at least 100 mm x 300 mm, and prepared in 
accordance with ISO 1514.  ................................ ................................................................ ................... 8 
A.1.2  Sag index applicator that is capable of applying a series of parallel stripes of paint, of 
width 7 mm and at intervals of 6 mm, of various thicknesses. The applicator should have 
gap clearance that range from 125 μm to 875 μm, steps of 125 μm.  ................................ ............... 8 
A.2 Procedure  ................................ ................................ ................................................................ ............... 8 
Annex B (normative)  Alkali resistance ............................................................................................................ 9  
B.1 Apparatus  ................................ ................................ ................................................................ ............... 9 
B.1.1  Fibre -cement panels , of size 150 mm x 70 mm x 5 mm, and prepared as in ISO 1514  .................. 9 
B.1.2  Test solution , 10 % by mass of sodium hydroxide in distilled water  ................................ .............. 9 
B.2 Procedure  ................................ ................................ ................................................................ ............... 9 
Annex C (normative)  Resistance to artificial weathering ............................................................................ 10 
C.1 Apparatus  ................................ ................................ ................................................................ ............. 10 
C.1.1  Aluminium panels, of size 150 mm x 70 mm, and solvent -cleaned in accordance wit h ISO 
1514  ................................ ................................................................ ................................ ....................... 10 PUBLIC REVIEW DRAFTDUS 745 : 2018 
iv © UNBS 2018  – All rights reserved  
 C.1.2  Paint applica tor that has a gap clearance of 400 μm  ................................................................ ...... 10 
C.1.3  Artificial weathering apparatus, comprising the following:  ...........................................................  10 
C.2 Test specimens  ................................ ................................ ................................................................ ... 10 
D.3 Procedure  ................................ ................................................................ ................................ ............ 10 
Bibliography ..................................................................................................................................................... 11 
 PUBLIC REVIEW DRAFTDUS  745: 2018  
© UNBS 2018  – All rights reserved  v 
 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 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 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. 
The committee responsible for this document is Technical Committee UNBS/TC5/SC2, Paints, Varnishes and 
related products. 
This DUS 745:2018; Second  edition cancels and replaces the first edition s US 745-1:2007 Road and runway 
marking paints — Specification — Part 1: Single pack solvent borne and water-borne paints and US 745-
2:2007, Road and runway marking paints — Specification — Part 2: Single pack water borne paints which 
have been technically revised.  
 
 PUBLIC REVIEW DRAFTPUBLIC REVIEW DRAFTDRAFT UGANDA  STANDARD  DUS 745 : 2018  
 
© UNBS 2018 – All rights reserved  1 
 Road and runway marking paints — solvent-borne and wat er-
borne paints — Specification  
1 Scope  
This Draft Uganda Standard specifies requirements, methods of test and sampling for conventional solvent-
borne and water-borne paints suitable for permanently marking traffic-bearing bituminous or concrete road 
and runway surfaces. The paint shall be reflectoried unless otherwise specified.  It makes provision for white, 
yellow and red  
2 Normative reference 
The following referenced 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 (including any amendments) applies. 
DUS 1976, Road Marking glass spheres (beads) — Specification 
DUS 1992, Test method for no-pick-up time of traffic paint  
DUS 1993, Abrasion resistance of organic coatings by Taber Abrader  
DUS 1994: Standard Practice for calculation of color tolerances and color differences from instrumentally 
measured color coordinates -  
DUS 1995; Standard Test Method for Consistency of Paints Measuring Krebs Unit (KU) Viscosity Using a 
Stormer-Type Viscometer- 
DUS 1997 Standard guide for application and evaluation of brush and roller applied paint films- 
DUS 1998 Standard test method for measuring the skid resistance of Standard test method for measuring the 
skid resistance of Pavements and Other Trafficked Surfaces Using a Continuous Reading, Fixed-Slip 
Technique  
DUS1999 Standard Test Method for Measurement of Retroreflective Pavement Marking Materials with CEN-
Prescribed Geometry Using a Portable Retroreflectometer-  
DUS 2000 Standard Test Method for Hiding Power of Paints by Reflectometry 
DUS 2001 Standard Test Method For Density of Liquid Coatings, Inks, and Related Produc ts 
DUS 2002 Standard Test Method for Volatile Content of Coatings 
DUS 2003 -Standard Test Method for Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type 
Gage 
DUS 2004 Standard Practice for Calculating Yellowness and Whiteness Indices from Instrumentally Measured 
Color Coordinates 
DUS 2005 Standard Test Method for Low Concentrations of Lead, Cadmium, and Cobalt in Paint by Atomic 
Absorption Spectroscopy 
DUS 2006 Standard Test Method for Low Concentrations of Chromium in Paint by Atomic Absorptio n 
Spectroscopy PUBLIC REVIEW DRAFT 
2 © UNBS 2018  – All rights reserved  
 DUS 2007 Standard Practice for Determination of Degree  of Bleeding of Traffic Paint 
US ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling 
US ISO 1514, Paints and varnishes — Standard panels for testing  
US ISO 1513, Paints and varnishes — Examination and preparation of samples for testing  
US ISO 2813, Paints and varnishes — Measurement of specular gloss of non-metallic paint films at 20º, 60º 
and 85º  
US ISO 3270, Paints and varnishes and their raw materials — Temperatures and humidities of conditioning 
and testing  
US ISO 2814, Paints and varnishes — Comparison of contrast ratio (hiding power) of paints of the same type 
and colour 
BS 381 C, Specification for colours for identification, coding and special purposes  
3 Terms and definitions  
For the purposes of this document, the terms and definitions given ISO 4618:2014 and the following apply ISO 
and IEC maintain terminological databases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp  
3.1  
defective  
test sample or a container of the paint that fails in one or more respects to comply with the relevant 
requirements of this standard  
3.2  
lot  
quantity of paint in containers that bear the same batch identification, from one manufacturer and submitted at 
any one time for inspection and testing  
3.3  
reflectivity  
reflectance of a paint film of such thickness that any further increase in film thickness does not give further 
change in the reflectance  
3.4   
retro-reflective paints  
paints that have an enhanced night-time visibility, achieved by the incorporation of suitable glass beads  
3.5  
standard atmosphere  
atmosphere contained in a test and conditioning enclosure, and that complies with the requirements of US 
ISO 3270. 
3.5  
bleeding 
is defined as the relative condition of discoloration manifested in traffic paint when applied to tar or asphaltic 
roads. 
 PUBLIC REVIEW DRAFTDUS 745: 2018 
© UNBS 2018  – All rights reserved  3 
 4 Types  
The paints shall be of the following types, as required:  
a) type 1: road marking paint for machine spray application: quick-drying paint for machine spray 
application to concrete or bituminous (or both) road/runway surfaces;  
b) type 2: road-marking paint for general application: quick-drying paint for application to concrete or 
bituminous (or both) road-runway surfaces;  
c) type 3: water-borne road-marking paint: water-borne paint suitable for application to concrete or 
bituminous or both)road/runway surfaces; and  
d) type 4: skid-resistant road-marking paint: skid-resistant paint for application to concrete or bituminous 
(or both) road/runway surfaces.  
NOTE 1 Types 1,2 and 3 may, if so required, also be supplied as retro-reflective paints or as suitable for 'premix' or 
'drop on 'bead 
NOTE 2 Retro-reflective paints with 'premix' beads have to conform to all the requirements of this Uganda Standard, 
except for wear resistance, before the addition of the beads.  
5 Requirements 
5.1 General requirements 
5.1.1 Condition in the container  
When sampled in accordance with US ISO 15528 and prepared and examined in accordance with US ISO 
1513, the paint shall show no evidence of; biological growth, corrosion of the container, livering or hard 
settlement, and shall be free from lumps, foreign material or surface skins that cannot be re-dissolved. Upon 
hand mixing the paint shall be returned to a smooth and homogeneous consistency, which is free from; gel 
structures, persistent foam or air bubbles. 
5.1.2 Storage stability  
After storage up to 6 months from the date of packaging in a 500 mL container under laboratory ambient 
conditions, the pigment shall be readily dispersed and viscosity of the paint shall not have changed more than 
5 KU from that of the freshly delivered paint. The paint shall still comply with all the requirements of 5.1 after 
the period of 6 months. 
5.1.3 Viscosity  
The viscosity of the paint shall meet the requirement specified in table 1 when determined in accordance with 
DUS 1995.  
5.1.4 Application properties  
5.1.4.1 Machine spray application (type 1 paints)  
When applied with machine spray equipment approved by the manufacturer, the paint shall spray without 
spattering and shall be capable of being applied as a uniform finish at the spreading rate and its method of 
determination, as agreed upon  PUBLIC REVIEW DRAFT 
4 © UNBS 2018  – All rights reserved  
 5.1.4.2 Brush application (type 2, type 3 and type 4 paints)  
When tested in accordance with  DUS 1997 on a fibre-cement panel of size 300 mm x 300 mm, the paint shall 
brush on without excessive drag, shall flow without leaving excessive brush marks, and shall join smoothly. 
The resultant dry film shall have a uniform appearance.  
5.1.4.3 Roller application (type 2 and type 3 paints)  
When tested in accordance with DUS 1997 on a fibre-cement panel of size 300 mm x 300 mm, the paint shall 
roll on smoothly without the formation of foam, and shall join smoothly. The resultant dry film shall have a 
uniform appearance.  
5.1.4.4 Spray application (type 2 and type 3 paints)  
When thinned in accordance with the manufacturer's directions for use, the paint shall be capable of being 
applied by pressure-feed or airless-spray equipment, without spattering. When the paint is sprayed onto a 
float glass panel of size 100 mm x 300 mm and dried, the dry film shall have a uniform appearance.  
5.1.5 Resistance to sagging (type 1, type 2 and type 3 paints)  
When the paint is tested in accordance with annex A, the width of any stripe applied with an applicator that 
has a gap clearance of 5 00 μm or less shall not show an increase that exceeds 1.75 mm.  
NOTE If the manufacturer does not supply any details, this test should be conducted at wet film thickness of 380 μm ± 10 
μm.  
5.1.6 Hiding power  
When applied by means of an applicator with a gap clearance of 200 μm and tested in accordance with DUS 
2000  white paint shall have a contrast ratio of at least 0.95 and all other paints shall have a contrast ratio of at 
least 0.90.  
5.1.7 Resistance to bleeding  
When determined in accordance with DUS 2007, the  difference between the reflectance of the paint applied 
over the taped portion and the reflectance of the paint applied over the untapped portion of the bitumen panel 
shall not exceed three units for white paint and one unit for yellow and red paint. 
5.1.8 Resistance to artificial weathering  
When determined in accordance with annex C, the luminance factor (see 5.1.14) of the paint on an exposed 
panel shall not differ by more than three units from the luminance factor of the paint on an unexposed panel.  
5.1.9 Resistance to abrasion (type 1, type 2 and type 3 paints  
When the paint is tested in accordance with DUS 1993, using CS 17 abrading wheels, a mass of 500 g and a 
test duration of 1 000 cycles, the loss in mass (L) shall not exceed 120 g/m2 when calculated using the 
following formula:  
 

2 21000000
R WRXBAL
  
 
where  
A  is the mass, in grams to the nearest 0.1 milligram of the test specimen before abrasion;  
B  is the mass, in grams to the nearest 0.1 milligram, of the test specimen after abrasion;  
R  is the radius, in millimetres, measured from the centre of the test specimen to the inside edge of the 
abrading wheel; and,  PUBLIC REVIEW DRAFTDUS 745: 2018 
© UNBS 2018  – All rights reserved  5 
 W  is the width, in millimetres, of the abrading wheel.  
5.1.10  Alkali resistance of paints for concrete surfaces  
When tested in accordance with annex B, a paint marked as suitable for application to concrete surfaces [see 
6.2(c)] shall not be removed from the tested panel, either partially or completely, when the paint is wiped dry 
with the paper towel.  
5.1.11 Skid resistance (type 4 paints)  
When the paint is applied and tested in accordance with 5.6 and DUS 1998, the coating shall have a wet skid 
resistance of at least 45 SRT units.  
5.1.12 Resistance to traffic wear  
5.1.12.1 Wear index  
When the paint is tested in accordance with DUS 1993 after 12 months, it shall have a wear index of not more 
than 35.  
5.1.12.2 Skid resistance (type 4 paints)  
When the paint is tested in accordance with DUS 1998 after 12 months, it shall have a skid resistance of at 
least 40 SRT units .  
5.1.12.3 Retro-reflectivity  
When a paint marked as retro-reflective is tested in accordance with DUS 1999, its initial retro reflection value 
shall be at least 150 mcd/m2.lx and its retro-reflection value after 12 months shall be at least 100 mcd/m2.lx. 
5.1.13 85° specular gloss  
When the paint is applied (onto a glass panel) with an applicator that has a gap clearance of 250 μm, and is 
dried for 4 h in a standard atmosphere and tested in accordance with ISO 2813, the coating shall have a 
maximum 85° specular gloss of 30.  
5.1.14 Luminance factor (reflectivity )  
When white paint is applied with an applicator that has a gap clearance of 400 μm, and is tested in 
accordance with ISO 2814, the reflectivity of the paint (Rw) shall be at least 80 %. 
5.1.15 Glass beads 
When tested in accordance with DUS 1976, the glass beads shall comply with the requirements specified 
there in. 
5.2 Colour  
5.2.1 Red and yellow paint  
The standard for red paint shall be matt 537 of BS 381 C and the reference colour standard for yellow paint 
shall be matt 356 of BS 381C. Or yellow marking material shall be to BS Colour No. 08E51 of BS 4800 and 
the colour of white markings shall be to BS colour number 00E55 of BS 4800 or as specified in the current 
Traffic Signs Manual. The total colour difference ∆E cmc (see Note 1), determined in accordance with DUS 
1994  and using the appropriate method given in 4.9, shall be small enough so that its component co-ordinates PUBLIC REVIEW DRAFT 
6 © UNBS 2018  – All rights reserved  
 fall within the ellipsoid for the reference standard that is defined by the semi-axes SL. Sc and SH and has a 
unit volume tolerance (see Note 2).  
NOTE 1 The notation ∆E cmc, as used here and in commercially available software, corresponds to the ∆E defined in 
DUS 1994, with I = 2 and c = 1 as chosen values.  
NOTE 2 When the semi-axis lengths in the formula for ∆E (see DUS 1994) equals the calculated value for ISL, cSL and 
SH, the resulting ellipsoid describes a unit volume tolerance of 1.  
5.2.2  Obliterating paint  
Obliterating paint shall conform to matt G04 reference colour standard. When determined in accordance with 
4.9, the colour difference ΔEab * shall not exceed 1.0, and the lightness difference ΔL* shall not exceed 2.0.  
5.3 Specific requirements 
The paint shall conform to the requirements specified in the table given below when tested in accordance with 
the test methods therein. 
 
Table 1 — Specific requirements for road marking paints 
Characteristic  requirement  Test method  
Water borne  Solvent borne  
White  Yellow  Black  White  Yellow  Black  
Density, g/ml,(±0.04)  1.68 1.63 1.62 1.415  1.367  1.367  DUS 2001  
Consistency , Krebs /Viscosity  78-92 78-92 78-90 70-88 70-88 70-88 DUS 1995  
Non volatile content, %w/w(± 
2.0) 77 76 76 72.2 71.5 71.5 DUS 2002  
Non volatile in vehicle,  %w/w, 
minimum  42 42 42 37 37 37 DUS 2002  
Fineness of dispersion,  
Hegman -Type Gage (microns)  25.0 25.0 25.0 25.0 25.0 25.0 DUS 2003  
Dry to no pick –up time without 
beads, minutes, Max  10 10 10 10 10 10 DUS 1992  
Dry through, Minutes,  max.  30 30 30 30 30 30 DUS 1992  
Yellowness index ,Max  8 - - 10 - - DUS 2004  
Lead,  mg/k g in dried paint , 
Max 20 20 20 20 20 20 DUS 2005  
Chromium, mg/kg in dried 
paints , max 5 5 5 5 5 5 DUS 2006  
 
6 Pack aging and Labelling 
6.1 Pack aging  
The paint shall be packed in clean, dry containers. The containers shall be strong enough to withstand normal 
usage, and shall be adequately sealed, to prevent leakage and contamination of the contents during normal 
transportation, handling and storage.  PUBLIC REVIEW DRAFTDUS 745: 2018 
© UNBS 2018  – All rights reserved  7 
 6.2 Labelling 
Each container, or a label securely fixed to the container, shall be clearly, legibly and indelibly marked with the 
following information:  
a) the manufacturer's name and brand name of the product  
b) the words 'Road-marking paint' or 'Road and runway marking paint' and, where applicable, the word 
'Retroreflective' or the words 'Skid resistant';  
c) where applicable, the words, 'For bituminous surfaces only' or 'For concrete and bituminous surfaces';  
d) the word 'Type', followed by the number of the type (see 4);  
e) the colour;  
f) where applicable, the words 'Suitable for drop-on beads application';  
g) the word 'Viscosity' followed by the numerical value of the viscosity (in Krebs units) and the letters 
'KU' (see 4.4);  
h) the drying-time ; 
i) the batch identification; and  
j) in the case of type 1, type 2 or type 3 paints, the directions for use, which should include all hazard 
warnings required by current legislation. 
7 Sampling 
Random sampling shall be done in accordance with US ISO 15528  PUBLIC REVIEW DRAFT 
8 © UNBS 2018  – All rights reserved  
 Annex A 
(normative)  
 
Resistance to sagging 
A.1 Apparatus  
A.1.1 Float-glass panel, of superficial size at least 100 mm x 300 mm, and prepared in 
accordance with US ISO 1514 . 
A.1.2 Sag index applicator that is capable of applying a series of parallel stripes of paint, of width 
7 mm and at intervals of 6 mm, of various thicknesses. The applicator should have gap clearance 
that range from 1 25 μm to 875 μm, steps of 125 μm.  
A.2 Procedure  
A.2.1 Use the sag index applicator to draw out the paint along the length of the panel and immediately place 
the panel in a vertical plane, with the paint stripes orientated horizontally and the thickest stripe at the bottom.  
A.2.2 Allow the paint to dry for 1 h in a standard atmosphere and then examine the stripes for sagging. 
Check for compliance with 5.1.5 .  
  PUBLIC REVIEW DRAFTDUS 745: 2018 
© UNBS 2018  – All rights reserved  9 
 Annex B 
(normative) 
 
Alkali resistance 
B.1 Apparatus  
B.1.1 Fibre-cement panels , of size 150 mm x 70 mm x 5 mm, and prepared as in ISO 1514  
B.1.2 Test solution , 10 % by mass of sodium hydroxide in distilled water  
B.2 Procedure  
B.2.1 Brush two coats onto the fibre-cement panel, each at a wet film thickness of 150 μm ± 10 μm, with a 
drying time of 2 h between coats.  
B.2.2 Dry the panel for 24 h in a standard atmosphere (see 3.5). Stand the panel upright in a glass beaker 
that contains the test solution, ensuring that the panel is immersed up to 75 % of its height. Leave the panel 
immersed in the test solution for 24 h.  
B.2.3 Immediately after its removal from the test solution, rinse the panel with tap water and thoroughly dry 
the painted surface with a paper towel. Check for compliance with 5.1.10 . PUBLIC REVIEW DRAFT 
10 © UNBS 2018  – All rights reserved  
 Annex C 
(normative) 
 
Resistance to artificial weathering 
C.1 Apparatus  
C.1.1 Aluminium panels, of size 150 mm x 70 mm, and solvent -cleaned in accordance with ISO 
1514  
C.1.2 Paint applicator that has a gap clearance of 400 μm   
C.1.3 Artificial weathering apparatus, comprising the following:   
a) an ultraviolet light source, with peak emission at 313 nm, that provides an irradiance of 18 
W/m2 ± 1 W/m2 in the range 270 nm to 320 nm;  
b) black panel temperature measurement;  
c) an evaporator with heater control;  
d) a heater with control; and  
e) a timer capable of switching at intervals of 1 h between UV light and condensation cycles.  
C.2 Test specimens  
Prepare two test panels (see C.1.1), applying paint prepared in accordance with 4.2 and using an applicator 
as in C.1.2. Allow the painted test panels to dry and age in a standard atmosphere (see 3.5) for 24 h.  
C.3 Procedure  
The test shall be performed as follows:  
a) keep one test specimen, unexposed, in a standard atmosphere (see 3.5) for 14 days; 
b) expose the other test specimen in the artificial weathering apparatus (see C .1.3) to 4 h + 4 h cycles 
that consist of a 4 h condensation phase with a black panel temperature of 50 °C ± 3 °C and a 4 h UV 
light phase (se e C.1.3 (a) with a black panel temperature of 60 °C ± 3 °C;  
c) maintain the cyclic exposure for 14 days;  
d) remove the test specimen from the artificial weathering apparatus and condition for 2 h in a standard 
atmosphere (see 3.5). Determine the reflectance of each test specimen in accordance with ISO 2814, 
and check for compliance with 5.1.8. PUBLIC REVIEW DRAFTDUS 745: 2018 
© UNBS 2018  – All rights reserved  11 
 Bibliography 
 PUBLIC REVIEW DRAFTPUBLIC REVIEW DRAFTDUS 745:  2018  
© UNBS 2018 – All rights reserved  13 
 Certification 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 relation 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 products 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.  
 
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