UGANDA STANDARD  
  US 775-2
First Edition
  2008-09-08
 
 
Reference numbe r
US 775-2: 2008
 © UNBS 2008 
  
Retro-reflective registration plates for motor vehicles — 
Specification — Part 2: Metallic registration number plates 
 US 775-2:2008 
ii © UNBS 2008 – 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 2008  
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, in cluding 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: 256 414 505 995 
Fax: 256 414 286 123 
E-mail: unbs@infocom.co.ug
Web: www.unbs.go.ug  US 775-2:2008 
© UNBS 2008 – All rights reserved  iii
 Contents Page 
Foreword ............................................................................................................................................................iv  
1 Scope.......................................................................................................................... ............................1  
2 Normative re feren ces........................................................................................................... .................1  
3 Terms and de finiti ons .......................................................................................................... .................1  
4 Requirements................................................................................................................... ......................2  
4.1 Materials ...................................................................................................................... ...........................2  
4.1.1 Aluminium ...................................................................................................................... ........................2  
4.1.2 Retro-reflecti ve mate rial ...................................................................................................... .................2  
4.1.3 Hot stam p foil.........................................................................................................................................4  
4.1.4 Optical variable security hologram ............................................................................................. ........4  
4.2 Shape and dimensions ........................................................................................................... ..............4  
4.3 License number, borde r and graphic............................................................................................. .....5 
4.3.1 General ........................................................................................................................ ...........................5  
4.3.2 Colour and lumi nance factor.................................................................................................... ............5  
4.3.3 Form and dimensions of characte rs of registra tion numbers..........................................................5  
4.3.4 Setting out the characters of  a registrati on number .........................................................................6  
4.3.5 Graphics ....................................................................................................................... ..........................6  
4.3.6 Workmans hip.........................................................................................................................................7  
4.4 Luminance factor ratio of character to background  colours............................................................7  
4.5 Performance.................................................................................................................... .......................7  
4.5.1 Resistance to weathering .....................................................................................................................7  
4.5.2 Resistance to  impact........................................................................................................... ..................7  
4.5.3 Resistance to  abrasion ......................................................................................................... ................7  
4.5.4 Resistance to scratching......................................................................................................................7  
5 Inspection and me thods of test ................................................................................................. ..........8  
5.1 Inspection..................................................................................................................... ..........................8  
5.2 Test sp ecimens................................................................................................................. .....................8  
5.3 Colour and luminance factor test (white and yellow)........................................................................8  
5.3.1 Chromaticity co-ordinates and luminance factors ............................................................................8  
5.3.2 Graphics ....................................................................................................................... ..........................8  
5.4 Photometri c test ............................................................................................................... .....................8  
5.4.1 Test sp ecimens................................................................................................................. .....................8  
5.4.2 Method....................................................................................................................................................8  
5.5 Resistance to weathering .....................................................................................................................8  
5.6 Resistance to  impact........................................................................................................... ..................9  
5.6.1 Apparatus...................................................................................................................... .........................9  
5.6.2 Procedure...................................................................................................................... .........................9  
5.7 Resistance to  abrasion ......................................................................................................... ................9  
5.7.1 Apparatus a nd reag ents ......................................................................................................... ..............9  
5.7.2 Procedure...................................................................................................................... .......................10  
5.8 Resistance to scratching....................................................................................................... .............10  
5.8.1 Apparatus...................................................................................................................... .......................10  
5.8.2 Procedure...................................................................................................................... .......................10  
6 Packing........................................................................................................................ .........................11  
7 Marking........................................................................................................................ .........................11  
 US 775-2:2008 
iv © UNBS 2008 – All rights reserved
 Foreword 
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry  of Tourism, Trade and 
Industry established under Cap 327, of the Laws of Uganda.  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 A limentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT/SPS Agr eements 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 gi ven field or area and consists of representatives of 
consumers, traders, academician s, manufacturers, governme nt and other stakeholders. 
Draft Uganda Standards adopted by the Technical Committ ee 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.  
Committee membership 
The following organisations were represented on the Technical Committee for Transport and Communication standards, UNBS/TC 8, in the development of this standard: 
• Arnold Brooklyn & Co Ltd 
• GM Tumpeco Ltd 
• Makerere University Kampala 
• Ministry of Works and Transport 
• Uganda Revenue Authority 
• Uganda Manufacturers Association (UMA) 
• Uganda National Bureau of Standards 
 
 
 
 
 
 
 
 UGANDA STANDARD US 775-2: 2008
 
© UNBS 2008– All rights reserved 1
 Retro-reflective registration plates for motor vehicles — 
Specification — Part 2: Metallic registration number plates 
1 Scope 
This Uganda Standard specifies requirem ents for metallic registration number plates that are intended for use 
on motor vehicles (including motor cycles and tricycles) and trailers. 
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. 
ASTM G 154, Standard practice for operating fl uorescent light apparatus for UV exposure of nonmetallic 
materials 
CIE 15, Colorimetry 
CIE 54.2, Retro-reflection – Definition and measurement  
ISO 7591 Road vehicles — Retro-reflective registration plates  for motor vehicles and trailers — Specification 
Traffic and Road Safety Act, 1998 
US 775-1, Retro-reflective registration plates for motor v ehicles — Specification — Part 1: Blanks (metal) 
3 Terms and definitions 
For the purposes of this standard, the following terms an d definitions together with terms and definitions in 
Part 1 shall apply. 
3.1 
blank 
aluminium plate of a size specified in 4.2, that has on one side an embo ssed border with retro-reflective 
material covering the face, for use in the manufacture of a number plate.  
3.2 
embossing 
process by which a character or a set of characters is applied to a plate in relief, on the retro-reflective surface side of a number plate 
3.3 
illuminant 
illuminant D65 as defined by the International Commission on Illumination (see CIE 15) 
3.4 
hot stamping foil 
foil, which is used for colouring of em bossed portion of the registration plate US 775-2:2008 
2 © UNBS 2008 – All rights reserved
 3.5 
licence number 
non-self-radiating letters, symbols and numerals either in combination or not as prescribed by the relevant 
national regulations 
3.6 
luminance factor 
ratio of the luminance of the material to that of  a perfect reflecting diffuser identically illuminated 
3.7 
optical variable device (OVD) 
device which allows easy verification and derivative of holographic security features with the naked eye 
3.8 
registration number plate 
plate that displays the licence number of a motor vehicle or trailer 
3.9 
retro-reflection 
reflection in which light is reflected in directions close to  the direction of incidence, irrespective of the angle of 
incidence at the reflecting surface 
3.10 
retro-reflective sheeting 
a multi-layer film with small retro-reflec tive elements very near the exposed surface. 
4 Requirements 
4.1 Materials 
4.1.1 Aluminium 
4.1.1.1 A blank shall be manufactured from aluminium with minimum thickness of 1.0 mm ± 0.1 mm. 
4.1.1.2 A blank constitutes the total combination of all the materials necessary to produce a registration 
number plate. 
4.1.1.3 A blank shall be free of protruding material detrime ntal to the proper functioning of a registration 
number plate. 
4.1.1.4 The mechanical properties shall allow embossing  and shall have a tensile strength of 90 N/mm2 
to 115 N/mm2 and a minimum elongation of 6 %. 
4.1.2 Retro-reflective material 
4.1.2.1 General 
The colour of the retro-reflective material for registra tion number plates shall be yellow, white, blue, red or 
green. 
The retro-reflective material shall be such that, when it is applied to an aluminium substrate, the colour, 
luminance factor and coefficients of retro-reflection comp ly with the relevant require ments of 4.1.2.2, 4.1.2.3 
and 4.1.2.4 
The plate shall have the whole of it s front surface covered with retro-reflective sheeting suitable for 
embossing. The sheeting shall be applied to form a durabl e bond with the aluminium metal substrate and shall 
form the background surface of  the registration plate.  US 775-2: 2008 
© UNBS 2008 – All rights reserved 3
 The retro-reflective surface shall be flat, smooth without cracks and shall exhibit uniformity of retro-reflection 
over its entire surface. The retro-refl ective sheeting shall bear a mark that identifies the manufacturer of the 
material. 
The optical properties of the retro-reflective  material shall be as specified in ISO 7591. 
The Uganda flag shall be hot stamped with excellent dur ability concerning abrasion and UV-resistance and 
shall be 50 mm x 30 mm in dimension. 
4.1.2.2 Colour and luminance factor 
4.1.2.2.1 When determined in accordance with  5.3, the colour of the retro-reflective material, without 
graphics, shall be yellow or white and the chromaticity co-ordinates shall be within the area on a chromaticity 
diagram defined by the lines joining the points of the appropriate values given in Table 1. 
4.1.2.2.2 The retro-reflective material with graphics shall be tested as specified in 5.3. 
4.1.2.2.3 When determined in accordance with 5.3, the lumi nance factor of the retro-reflective material, 
without graphics, shall be at least the appropriate value given in Table 1. 
Table 1 — Chromaticity co-ordinates and luminance factors 
Value of co-ordinate Colour Co-ordinate 
1 2 3 4 Luminance 
factor, min. 
Yellow x 
y 0.465 
0.454 0.427 
0.483 0.487 
0.423 0.545 
0.534 0.27 
White x 
y 0.355 
0.355 0.305 
0.305 0.285 
0.325 0.335 
0.375 0.35 
 
4.1.2.3 Coefficients of retro-reflection 
When the coefficients of retro-reflection of the mate rial (with graphics, if provided) are determined in 
accordance with 5.4, they shall be at leas t the relevant values given in Table 2. 
Table 2 — Coefficients of retro-reflection 
Coefficient of retro – reflection when measured with standard 
illuminant A, 
cd(/lx.m2) min.  
Observation angle,  
degrees    
Entrance angle, 
degrees 
Graphicb) Yellow White 
0.33a) 
1.5 5a) 
30 35 
1.5 35 
1.5 50 
2.0 
a)  The coefficient of retro-reflection at an angle of observation and an entrance angle of 0.33° and 5° respectively, shall not e xceed 100 
cd/(lx.m2) for yellow material and 160 cd/(lx.m2) for white material. 
b) The total retro-reflection per unit area of a full number plate including graphics without characters. 
Graphics shall be printed on a white retro-reflective material and shall have a retro-reflective value as given in Table 2,. 
4.1.2.4 Markings of retro-reflective material 
When examined in accordance with 5.1, the retro-reflecti ve material shall bear a legible and indelible serial 
number.  US 775-2:2008 
4 © UNBS 2008 – All rights reserved
 4.1.3 Hot stamp foil 
The colour of the hot stamp foil shall be black, red, white, green or blue to ink the embossed legend. The foil 
shall meet the requirements as specified in ISO 7591. T he inking/colouring of the embossed registration plate 
shall be done via hot stamping. 
4.1.4 Optical variable security hologram  
Application of the hologram shall be via hot stamping on to the retro-reflective sheeting. The hologram size 
shall be 20 mm x 20 mm and it shall be well designed for long term exterior use and shall be easy to verify. 
The hologram shall be made of chrome. It shall withstand hard test conditions for registration plates according 
to ISO 7591. 
4.2 Shape and dimensions 
When measured in accordance with 5.1, number plates shall be rectangular, with corners rounded to a radius 
of 13 mm, be free from sharp edges and burrs, and shall be of one of the following sizes as shown in Tables 3 
and 4 below: 
Table 3 — Dimensions for motor vehicle plates 
 
Vehicle Size 
Public vehicle plates: 
 Front 
 Back (520 mm x 110 mm) ± 3 mm 
(230 mm x 205 mm) ± 3 mm 
Diplomat/CD vehicle plates: 
 Front 
 Back (520 mm x 110 mm) ± 3 mm 
(340 mm x 205 mm) ± 3 mm 
Government vehicle plates: 
 Front 
 Back (520 mm x 110 mm) ± 3 mm 
(340 mm x 205 mm) ± 3 mm 
Duty free vehicle plates: 
 Front 
 Back (520 mm x 110 mm) ± 3 mm 
(340 mm x 205 mm) ± 3 mm 
Personalized vehicle plates: 
 Front 
 Back (520 mm x 110 mm) ± 3 mm 
(340 mm x 205 mm) ± 3 mm 
 US 775-2: 2008 
© UNBS 2008 – All rights reserved 5
 Table 4 — Dimensions for category “L” motor vehicle 
 
Vehicle Size 
(255 mm x 135 mm) ± 3 mm Public motor cycle plates 
 Front 
 Back (255 mm x 135 mm) ± 3 mm 
Government motor cycle plates 
 Front 
 Back (255 mm x 135 mm) ± 3 mm 
(255 mm x 135 mm) ± 3 mm 
Duty free vehicle plates 
 Front 
 Back (240 mm x 135 mm) ± 3 mm 
(240 mm x 135 mm) ± 3 mm 
 
4.3 License number, border and graphic 
4.3.1 General 
When measured in accordance with 5. 1, the registration number and the border shall be raised to a height of 
not more than 1.6 ± 0.3 mm above the retro-reflective background. The registrati on plate shall have embossed 
digits and embossed letters. The registration plate shall have an embossed border of an inner width of 4 mm ± 
1 mm. 
The registration plate shall have a chrome based OVD hol ogram. The OVD shall be an integral part of the 
registration plate and shall be hot stamped. 
4.3.2 Colour and luminance factor 
4.3.2.1 Colour 
The registration number and the border sha ll be black, blue, red, white or green. 
4.3.2.2 Luminance factor 
When the luminance factor of the colours black, blue, red, white or green is determined in accordance with 
5.3, it shall not exceed 0.07. 
4.3.3 Form and dimensions of characters of registration numbers 
4.3.3.1 General 
When examined and measured in accordance with 5. 1, dependent upon the number plate size, the number of 
characters in the registration number and the height of the characters, the form and dimensions of the 
characters of the registration number shall be as prescr ibed in 4.3.3.2 for 75 mm high characters and 4.3.3.3 
for 49 mm high characters. 
4.3.3.2 The 75 mm high characters of a registration number 
The characters shall consist of: US 775-2:2008 
6 © UNBS 2008 – All rights reserved
 a)  not more than seven characters in one li ne on a plate of size (520 mm × 110 mm) ± 3 mm (see 
Figure 5); or  
b)  not more than seven characters in one li ne on a plate of size (340 mm × 205 mm) ± 3 mm (see 
Figure 6);  or 
c)  not more than seven characters in two lines on a plate of size (230 mm × 205 mm) ± 3 mm (see 
Figure7)   
d)  shall be of height 75 mm ± 1.0 mm and shall hav e shapes that conform to those of the appropriate 
characters given in Figure 1 or Figure 2. 
4.3.3.3 The 49 mm high characters of a registration number 
The characters shall consist of: 
a) not more than seven characters in two lines on a plate of size (255 mm × 135 mm) ± 3 mm (see Figure 
3); or 
b) not more than seven characters in two lines on a plate of size (240 mm × 135 mm) ± 3 mm (see Figure 4)   
c) shall be of height 49 mm ± 1.0 mm and shall hav e shapes that conform to those of the appropriate 
 characters given in Figure 1 or Figure 2. 
4.3.4 Setting out the characters of a registration number 
When measured in accordance with 5.1, t he characters shall be placed as follows: 
a) Width of space between outside edge of the plate and Uganda flag, (not of a background 
graphic).......................................................................................................................  12.9 mm ± 2 mm. 
b) Width of spaces between inside edge of the embo ssed border of the plate and the last character and 
between the first characte r and Uganda flag .............. ................ ................... .................11 mm ± 2 mm 
c) Width of space between rows of characters on a plate that bears a double row of  characters for 75 
mm characters.................................................................................................................1 5 mm ± 1 mm 
d) Width of space between rows of characters on a plate that bears a double row of  characters for 49 
mm characters.................................................................................................................1 2 mm ± 1 mm 
e) Width of space that separates adjacent groups of letters and 
numerals....................................................................................................................... .... 8 mm ± 2 mm  
f) Width of space between adjacent letters in groups of letters, and width of space between adjacent 
numbers in groups of numbers shall be equal, subject to a tolerance of ± 1 mm. 
NOTE The spacing of characters and numerals on personalized plates should comply with the requirements 
specified by the relevant national authority provided that the characters are symmetrically placed. 
4.3.5 Graphics 
When examined in accordance with 5.1, graphics s hall be of not more than five colours, and shall not 
negatively affect the legibility of the registration number or be of such a design as to be mistaken for a letter or 
numeral. 
NOTE Where applicable a non-background graphic shoul d not exceed a width of 45 mm and a height of 75 mm. 
 US 775-2: 2008 
© UNBS 2008 – All rights reserved 7
 4.3.6 Workmanship 
4.3.6.1  When examined in accordance with 5.1, the re tro-reflective material, registration number and 
border of a plate shall be free of creases, chips, blisters, discolouration and spots. 
4.3.6.2  The registration number shall be clearly defined. 
4.3.6.3  A plate shall be of such flatness that, when it is laid (with the licence number upwards) on a flat 
surface, no part, except raised characters or a border, is more than 3 mm from the surface. 
4.4 Luminance factor ratio of character to background colours 
When determined in accordance with 5.3, the ratio of the luminance factor values between the character 
colour and the adjacent retro-reflective background and,  if applicable, between the character colour and 
adjacent graphic background colour, shall not be less than 5:1. 
4.5 Performance 
4.5.1 Resistance to weathering 
When tested in accordance with 5.5, 
a) the chromaticity co-ordinates shall remain within  the area on the appropriate chromaticity diagram as 
 given in Table 1; 
b) the coefficient of retro-reflection at an angle of observation and an entrance angle of 0.33° and 5° 
 respectively, shall be at least 80 % of the minimum values given in Table 2; 
c) the retro-reflective material and the registration number or border shall show no sign of cracking, 
 blistering or loss of adhesion that would affect the functionality of the plate when viewed from a distance 
 of approximately 250 mm under a standard light source, providing 400 lx; and 
d) the coated character and border surface shall show no  sign of chalking or cracking that would affect the 
 functionality of the plate. 
4.5.2 Resistance to impact 
When tested in accordance with 5.6, and where applicable,  the retro-reflective material, character, border, the 
coated surface of the character and border, and the bas e material, shall show no cracking or separation from 
the substrate outside a distance of 5 mm from the impacted area. 
4.5.3 Resistance to abrasion 
When tested in accordance with 5.7, and, when app licable, when viewed from a distance of approximately 
250 mm under a standard light source (providing 400 lx ), there shall be no sign of penetration through the 
coating on the surfaces of the characters to the substr ate that would affect the functionality of the plate. 
4.5.4 Resistance to scratching 
When tested in accordance with 5.8, the scratch 
a) produced on the retro-reflective surface shall not have penetrated the material surface, and 
b) produced on the coated surface of  the characters and border, shall be free from jagged edges and where 
 applicable shall not have penetrated through to the reflective material. US 775-2:2008 
8 © UNBS 2008 – All rights reserved
 5 Inspection and methods of test 
5.1 Inspection 
Visually examine and then measure each plate in the sample for compliance with all the relevant requirements 
for which tests to assess compliance is not given in 5.3 to 5.8 (inclusive). 
5.2 Test specimens 
From the sample number plates, prepare the following test specimens: 
a) resistance to weathering — one complete number plate; 
b) resistance to impact —  one complete number plate; 
c) resistance to abrasion —  one complete number plate; and 
d) resistance to scratching —  one test specimen of width 50 mm and of length 110 mm. 
5.3 Colour and luminance factor test (white and yellow) 
5.3.1 Chromaticity co-ordinates and luminance factors 
Determine the chromaticity co-ordinates and luminance factors of the relevant areas of the specimen by 
means of a spectrophotometer or othe r equally suitable colour measuring device in accordance with CIE 15, 
using standard illuminant D65 and 45/0 geometry. Che ck for compliance with 4. 1.2.2, 4.3.2.2 and 4.4. 
5.3.2 Graphics 
Select specimens of size 70 mm × 45 mm from those ar eas of graphics of the plat e that might affect the 
legibility of the registration number. Determine the lumi nance factor by means of a spectrophotometer or other 
equally suitable colour measuring device in accordance  with CIE 15, using standard illuminant D65 and 45/0 
geometry. Check for compliance with 4.3.2.2 and 4.4. 
5.4 Photometric test 
5.4.1 Test specimens 
5.4.1.1 White and yellow plates,  test panel of size 120 mm × 150 mm 
5.4.1.2  Plate with graphics, full plate divided transversely into three equal sized sections 
5.4.2 Method 
Determine the coefficients of retro- reflection in accordance with CIE 54.2, using the values of observation 
angle and entrance angle given in Table 2. 
In the case of plates with graphics, calculate the to tal retro-reflection of the three sections and express as 
cd/(lx.m2). Check for compliance with 4.1.2.3. 
5.5 Resistance to weathering 
Mount the specimen [see 5.2(a)] with the test surface fa cing the lamps, and subject it to artificial weathering 
using the apparatus and method given in ASTM G 154 fo r 240 h, using a cycle of 4 h UV exposure at 60 °C 
and then 4 h condensation exposure at 50 °C. US 775-2: 2008 
© UNBS 2008 – All rights reserved 9
 Check for compliance with 4.5.1 after completion of the test. 
5.6 Resistance to impact 
5.6.1 Apparatus 
5.6.1.1 Striker, a steel ball of diameter 25 mm 
5.6.1.2 Base , a solid support base such as concrete  or a steel plate of thickness 12.5 mm 
5.6.2 Procedure 
5.6.2.1 So place the specimen [see 5.2(b)] on the base that  the striker will fall ont o a central flat section 
of the specimen. 
5.6.2.2  Raise the striker 2 m above the specimen and allow it to fall. 
5.6.2.3  Repeat 5.6.2.1 and 5.6.2.2, but with the point of impact being on part of the coated surface of a 
character. 
5.6.2.4  Examine the specimen for compliance with 4.5.2. 
5.7 Resistance to abrasion 
5.7.1 Apparatus and reagents 
5.7.1.1 Washability testing apparatus (see Figure 9), that consists of a brush with stiff black buttcut 
Chinese hog bristles securely wired into an aluminium brush block of size approximately 90 mm × 40 mm × 13 
mm. There are 60 holes in the brush block, each of diameter about 4 mm,  solidly filled with bristle. The 
abrading surface of the bristles (which extend 20 mm bel ow the block) is dressed down with sandpaper or, if 
necessary, so levelled on a hotplate that it is as nearly plane as possible. 
The brush is held in a metal frame on which masspieces  are symmetrically loaded to bring the total mass of 
the brush assembly to 450 g + 5 g 
5.7.1.2 Suitable drawing mechanism  that does not exert a vertical force on the brush and enables  the 
brush to be moved back and forth over the specimen under  test at a constant speed of 35 oscillations per 
minute to 40 oscillations per minute (70 strokes to 80 strokes).The length of each stroke is adjusted to 
approximately 330 mm. The apparatus is mounted on a hor izontal table that has means for securing the 
specimen under test. A supply of cleaning solution is so arranged as to drip onto the specimen, and there is 
suitable means for collecting excess solution and for en suring that the specimen is at no time completely 
immersed in the cleaning solution. Replace the brush when  the bristles have become so worn that they extend 
less than 16 mm from the block. 
5.7.1.3 Detergent solution , a mass fraction of 0.5 % solution, in distilled water, of a detergent that has 
the following composition:  
                    mass fraction, % 
Sodium pyrophosphate ..................................................................................... 51 
Sodium sulfate, anhydrous. .................. .................. ................ .............. ............. 16 
Sodium dodecyl benzene su lfonate, 80 % ......... ...................................... ......... 23 
Sodium metasilicate, soluble............................................................................. 8.5 US 775-2:2008 
10 © UNBS 2008 – All rights reserved
 Sodium carbonate........... ................ ...................................... .................. .......... 1.5 
5.7.2 Procedure 
5.7.2.1  Immerse the brush bristles to a depth of about 13 mm in water at 25 °C to 30 °C for 30 min. 
Shake the brush vigorously to remove excess water and then soak it for 5 min in the specified detergent 
solution. 
5.7.2.2  Mount the specimen [see 5.2(d)] firmly in the washability testing apparatus. So place the wet 
brush on the surface to be tested that its 90 mm dimension is in the direction of motion. Wet the surface of the 
specimen, and start oscillating the brush immediately. Du ring the test, allow additional cleaning solution to drip 
in the path of the brush in sufficient quantities to keep the test surface wet. 
Run the apparatus for 10 000 oscillations. 
5.7.2.3  Remove the specimen, wash it immediately with warm water, and examine the test surface within 
the middle 100 mm of the brush pat h for compliance with 4.5.3. 
5.8 Resistance to scratching 
5.8.1 Apparatus 
5.8.1.1 Needle and arm:  a needle with a hardened steel hemispherical point of diameter 1 mm, fixed 
vertically, point downwards, to the end of a counterpois ed horizontal arm. The horiz ontal arm provides for the 
loading of masspieces above the needle direct, and it may be set in equilibrium on its fulcrum by adjustment of 
the counter-mass before masspieces are loaded above the needle. 
5.8.1.2 Masspieces , a set of 30 masspieces of 50 g each 
5.8.1.3 Base with sliding specimen holder , a sliding specimen holder that moves freely and 
automatically on its base under the loaded needle (which is perpendicular to the specimen holder) 
5.8.1.4 Electric current supply and ammeter : the needle and specimen holder are connected in series 
with an ammeter and an electric current supply that, w hen the coated surface of a specimen is penetrated, the 
needle makes electrical contact with the underlying alumin ium, and this penetration is indicated by a flow of 
current through the ammeter. 
5.8.2 Procedure 
5.8.2.1 In the case of a retro-reflective  surface, set the horizontal arm in equilibrium, with the electric 
current supply and ammeter in use. Clamp the specimen [see 5.2(d)] to the specimen holder, with the material 
to be tested facing upwards. Load the needle with 20 ma sspieces (that is, to a total mass of 1 000 g) and 
lower the needle carefully onto the material su rface while starting to slide the holder. 
Alternatively, so put the end of the needle on a razo r blade on the material surface that the needle can slide 
off the sharp edge of the blade onto the surface. Sli de the holder at a uniform speed of approximately 30 
mm/s for a distance of about 90 mm. 
5.8.2.2  Examine the edges of the groove under 10 × magnification. 
5.8.2.3  Check for compliance with the re levant requirements of 4.5.4. 
5.8.2.4  Repeat 5.8.2.1 to 5.8.2.3 on two ot her parts of the material surface. 
5.8.2.5  In the case of a coated surface, carry out the te st as given in 5.8.2.1 to  5.8.2.4, but with the 
electric current supply and ammeter in use. US 775-2: 2008 
© UNBS 2008 – All rights reserved 11
 6 Packing 
The plates shall be so packed as to ensure that they  are not damaged during normal handling, transportation 
and storage. 
7 Marking 
7.1 No marking other than the registration number, t he graphics (when applicable), the marking required in 
terms of 4.1.2.4 and,7.2 and the border shall appear on the front surface of a registration number plate. The 
marking shall not interfere with the legibility of the registration number. 
7.2 The front surface of the plate shall bear in legible and indelible marking, the serial number of the blank, 
Uganda flag and security hologram.  
7.3 The back surface of the plate shall bear in legible and indelible marking the trade name or trade mark of 
the manufacturer of the plate. US 775-2:2008 
12 © UNBS 2008 – All rights reserved
 
 
 
Figure 1 — Shapes of 75 mm high letters and numerals – FE font (Nominal width – 40 mm) 
 
 
 US 775-2: 2008 
© UNBS 2008 – All rights reserved 13
 
 
 
Figure 2 — Shapes of 75 mm high letters and numerals – FE modified font (Nominal width – 34 mm) 
 
 
 
 US 775-2:2008 
14 © UNBS 2008 – All rights reserved
  
 
 
 
 
 
 
Figure 3— Plate:  255 x 135 x 1R13 
 
 
 
 
 
Figure 4 — Plate: 240x 135 x 1 R13 US 775-2: 2008 
© UNBS 2008 – All rights reserved 15
   
 
 
 
 
 
 
 
Figure 5 — Plate: 520 x 110 R13 
 
 US 775-2:2008 
16 © UNBS 2008 – All rights reserved
 
 
 
 
 
Figure 6 — Plate: 340 x 205 x R13 
  
 
 US 775-2: 2008 
© UNBS 2008 – All rights reserved 17
 
 
 
Figure 7 — Plate: 230 x 205 R13 
 
 
 
 
 
 
 
 
 
 
 
 US 775-2:2008 
18 © UNBS 2008 – All rights reserved
  
 
 
Figure 8 — Security hologram for plates 
 
 
 
 
 
 
 
 
 US 775-2: 2008 
© UNBS 2008 – All rights reserved 19
  
 
 
 
 
 
   
 
Figure 9 — Apparatus for resistance to abrasion testing 
 
 
 US 775-2: 2008 
© UNBS 2008– All rights reserved 20
 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 mark may be inscribed on outer packaging.  
The use of the UNBS Certification Mark is gove rned by the Standards Act, and the Regulations made 
thereunder. This mark can be used only by those licens ed under the certification mark scheme operated by 
the Uganda National Bureau of Standards and in co njunction 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.  
 
 US 775-2: 2008 
 
ICS nn.nnn.nn 
Price based on 26 pages 
© UNBS 2008– All rights reserved