1、BRITISH STANDARD AUTOMOBILE SERIES CONFIRMED SEPTEMBER1990 BSAU 152:1970 Specification for Rear marking plates forvehiclesBS AU 152:1970 This BritishStandard, having been approved by the AutomobileIndustry StandardsCommittee, waspublished under theauthorityofthe ExecutiveBoardof the Institution on 3
2、0April1970 BSI02-2000 The following BSI references relate to the work on this standard: Committee reference AUE/1 Draft for comment69/10282 ISBN 0 580 06160 4 Foreword This BritishStandard has been prepared under the authority of the Automobile Industry Standards Committee of BSI at the request of t
3、he Ministry of Transport. Its purpose is to provide a specification for rear marking plates for vehicles to be used in accordance with the appropriate Regulation in order to give following vehicles adequate warning, both by day and by night, of particular types or lengths of vehicles which might con
4、stitute a hazard. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This d
5、ocument comprises a front cover, an inside front cover, pagesi andii, pages1 to12, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments
6、issued since publication Amd. No. Date CommentsBS AU 152:1970 BSI 02-2000 i Contents Page Foreword Inside front cover 1 Scope 1 2 Definitions 1 3 Design 1 4 Type test 1 5 Marking 1 6 Materials 1 7 Preparation and finish of plates 1 8 Reflex reflecting and fluorescent surfaces 1 9 Letters and borders
7、 2 10 Adhesive marking plates 2 11 Colour 2 12 Photometric requirements 2 13 Accelerated weathering 3 14 Bending and corrosion 4 15 Fuel resistance 4 16 Bonding strength 4 17 Water resistance 4 18 Thermal resistance 4 19 Abrasion resistance 4 20 Attachment of marking plates to the vehicle with adhes
8、ive 4 21 Attachment of individual letters and borders by adhesive 5 22 Rigidity of suspended marking plates 5 Appendix A Terms and symbols relating to reflex-reflecting devices 6 Appendix B Apparatus and method for accelerated weathering test 7 Figure 1 Explanatory diagram of symbols used 7 Figure 2
9、 Types of rear marking plates 9 Figure 3 Apparatus for accelerated weathering test: assembled views 10 Figure 4 Apparatus for accelerated weathering test: details of spraynozzles 11 Figure 5 Arrangements for measurement of reflective intensity of wet reflectorized test specimens 12 Table 1 Reflex-re
10、flecting material: chromaticity limits 2 Table 2 Fluorescent material: colour limits before and after weathering 2 Table 3 Minimum CIL per square metre of reflex-reflecting surfaces in candelas per lux 3ii blankBS AU 152:1970 BSI 02-2000 1 1 Scope This BritishStandard specifies requirements for mark
11、ing plates faced with reflex-reflecting and fluorescent materials for fitting to the rear of certain vehicles and trailers. The standard includes requirements for colorimetric and photometric properties and tests for certain physical requirements. 2 Definitions For the purposes of this BritishStanda
12、rd the following definitions, together with those given in Appendix A, apply: 2.1 rear marking plate a rectangular backing plate faced with reflex-reflecting and fluorescent materials and, where appropriate, letters, as prescribed in this specification NOTE 1The direct attachment with adhesive of re
13、flex-reflecting and fluorescent materials only to the vehicle does not constitute a rear marking plate for the purposes of this BritishStandard. 2.2 sample unit a complete rear marking plate, as used NOTE 2Photometric units such as lumen (lm), candela (cd), etc., are as defined in BS233, “Glossary o
14、f terms used in illumination and photometry”. 3 Design 3.1 Dimensions. Five types of rear marking plates are specified, as shown in Figure 2. NOTEExcept for the mounting position on the vehicle, Types2 and3 are identical. The dimensions of the plates and of the reflex-reflecting and fluorescent area
15、s and the proportions of the letters shall be as prescribed or otherwise authorized in the appropriate Regulation. 3.2 Stiffening. When rear marking plates are to be freely suspended from a vehicle they shall be stiffened either by flanges integral with the plate and forming part of it, or by means
16、of a separate stiffening structure. Such separate stiffening need not be included in the sample unit for the purpose of the bending and corrosion test in Clause14. Rear marking plates that have been stiffened shall comply with the requirements of Clause22. 4 Type test Representative sample units sha
17、ll be submitted to an independent testing authority for type testing. The number of sample units to be selected for testing shall be agreed between the manufacturer and the testing authority but will normally comprise not less than two representative samples of Types1,2 or3, two of Type4 and two of
18、Type5. All the sample units submitted shall comply with all the requirements in this standard. 5 Marking Each rear marking plate shall be permanently and legibly marked, in such a position as to be clearly visible when the marking plate is fitted to the vehicle, with the following information: 1) Th
19、e name, trade mark or other means of identification of the maker. 2) The number of this BritishStandard, i.e. BS AU152. NOTEAttention is drawn to certification facilities offered by BSI; see the inside back cover of this standard. 6 Materials Rear marking plates may be manufactured from any suitable
20、 material which shall perform satisfactorily in service and satisfy the requirements of this standard. 7 Preparation and finish of plates Before the application of the reflex-reflecting and the fluorescent surfaces, the surface of the backing plate shall be free from grease, oil, dirt and any loose
21、or temporary coatings and shall be suitable for and adequate to receive the materials to be applied. 8 Reflex-reflecting and fluorescent surfaces 8.1 Any material may be used for the reflex-reflecting and the fluorescent areas or borders provided that it is applied so as to give the appearance of a
22、continuous surface and that it complies with all the relevant requirements of this standard. 8.2 Where holes are pierced for fixing the rear marking plate to the vehicle or for attaching letters to the marking plate, such holes shall be adequately-protected against any deleterious effect on the appl
23、ied surface material. Where, after the marking plate has left the makers works, it may be pierced with holes which can have a subsequent deleterious effect on the reflex-reflecting or fluorescent material, the marking plate maker shall attach to each plate a label giving adequate instructions for su
24、itably fixing the plate to the vehicle in order to prevent such deleterious effect.BS AU 152:1970 2 BSI 02-2000 9 Letters and borders Letters and borders shall be securely attached to the rear marking plate so that they cannot be readily detached therefrom. 10 Adhesive marking plates Where a rear ma
25、rking plate is intended to be attached to the vehicle with adhesive, the marking plate maker shall give adequate instructions for the preparation of the surface to which it is to be attached and shall state the materials or surfaces for which the attachment of his marking plate is unsuitable. 11 Col
26、our 11.1 The colour of the reflex-reflecting material, the fluorescent material and the letters shall be as indicated in Figure 2, as appropriate. 11.2 Reflex-reflecting material 11.2.1 When the yellow reflex-reflecting surface is illuminated by CIE Standard Illuminant A 1) , with an observation ang
27、le of% and an entrance angle V = 5 , H =0 , the chromaticity values shall be within the area on the chromaticity diagram defined in Table 1. The colour shall have chromaticity co-ordinates which lie within the area formed by the straight lines defined by the pairs of points1 and2;2 and3;3 and4; and
28、the spectrum locus. 11.2.2 When the yellow reflex-reflecting surface is illuminated by CIE Standard Illuminant C 2)under the condition of normal incidence 10 and viewed at45 , the luminance factor shall be29%min. and39%max. 11.3 Fluorescent material. The fluorescent material, when illuminated by CIE
29、 Standard Illuminant C 2)under the condition of normal incidence 10 and viewed at45 , shall have a dominant wavelength, purity and luminance factor in accordance with the values given in Table 2. NOTEThe luminance factor includes both the reflected and the fluorescent luminous flux. 11.4 Letters. Th
30、e letters on the Types4 and5 rear marking plates shall be black in colour and when illuminated normally by CIE Standard Illuminant C 2)and viewed at45 they shall have a maximum luminance factor of5%. 12 Photometric requirements The coefficient of luminous intensity (CIL) of the reflex-reflecting sur
31、faces of the marking plate, when illuminated by CIE Standard Illuminant A 3) , shall be measured for each of the observation angles and the entrance angles specified in Table 3. The CIL at any of the test points in Table 3 at the2 observation angle shall not exceed150cd/lx. For making the necessary
32、measurements, either of the methods recommended by the CIE or the Road Research Laboratory 4)for the photometry of reflex-reflecting surfaces shall be used. The normal axis to the plate shall be taken as the H-V direction. The plate shall not be rotated and all measurements shall be made for& =0 . T
33、he angular subtense values and shall not exceed05. NOTEAn explanation of the terms and symbols used is given in Appendix A. Table 1 Reflex-reflecting material: chromaticity limits Table 2 Fluorescent material: colour limits before and after weathering 1) As defined in the proceedings of the1951 meet
34、ing of the International Commission on Illumination (CIE). 2) As defined in the proceedings of the1931 meeting of the International Commission on Illumination (CIE). 3) As defined in the proceedings of the1951 meeting of the International Commission on Illumination (CIE). 4) See Road Research Techni
35、cal Paper No.42, “Reflex reflectors”. Colour Co-ordinate Chromaticity co-ordinates of points at the corners of the area on the chromaticity diagram 1 2 3 4 Yellow x y 0.538 0.460 0.520 0.460 0.560 0.420 0.579 0.420 Exposure Dominant wavelength Excitation purity Luminance factor Min. Max. Min. Min. M
36、ax. Unexposed 300hours exposure nm 610 600 nm 617 % 95 92 % 31 % 60BS AU 152:1970 BSI 02-2000 3 Table 3 Minimum CIL per square metre of reflex-reflecting surfaces in candelas per lux 13 Accelerated weathering 13.1 Procedure. For each test two identical specimens of a sample unit (see Clause2) are ta
37、ken. One specimen shall be stored in the dark in a dry container for subsequent use as the “reference unexposed specimen”. The second specimen shall be exposed for1200hours to an atmospheric weathering test using the apparatus and the method described in Appendix B. After the test the specimen shall
38、 be washed in a dilute neutral detergent solution and examined for compliance with the requirements specified in13.2 to13.5 inclusive. 13.2 Visual appearance. No area of the exposed specimen shall show any evidence of cracking, scaling, pitting, blistering, de-lamination, distortion, blooming, stain
39、ing, corrosion or chalking. There shall be no shrinkage in excess of0.5% in any linear direction and no evidence of any adhesion failure such as edge lifting from the substrate. 13.3 Colour fastness 13.3.1 Reflex-reflecting material. The colour of the exposed specimen when compared with that of the
40、“reference unexposed specimen”(see13.1) shall have a fastness rating of not less than3 when measured by the Geometric Grey Scale in BS2662 5) . 13.3.2 Fluorescent material. After exposure for300hours to an atmospheric weathering test, using the apparatus and method described in Appendix B and washin
41、g as in13.1, the specimen shall be examined for compliance with13.2. In addition, when illuminated by CIE Standard Illuminant C 6)under the condition of normal incidence 10 and viewed at45 , any shift in dominant wavelength and change in purity and luminance factor shall be such that the values are
42、within the limits given in Table 2. 13.4 Effect on CIL value of reflex-reflecting material 13.4.1 For this test, measurements shall be made only at an entrance angle of5 and an observation angle of012 by the method given in Clause11. 13.4.2 The CIL of the exposed specimen when dry shall be not less
43、than80% of the relevant value in Table 3. 13.4.3 The specimen shall then be subjected to a fine water spray using the apparatus shown in Figure 5 and kept continuously wetted. The CIL of the specimen under this condition shall be not less than90% of the value obtained when measured dry in13.4.2. 13.
44、5 Effect of dirt on reflex-reflecting material 13.5.1 The tests shall be made using the same exposed specimen and after the tests described in13.4. 13.5.2 The dry specimen shall first be artificially dirtied by the application of a layer of graphite grease thick enough to obscure the face of the spe
45、cimen. The layer of grease shall then be removed by washing with a clean mixture of water and a neutral detergent. A soft bristle brush may be used to assist in the removal of the dirt, if necessary. 13.5.3 The specimen shall then be tested in accordance with Clauses11 and12 and shall comply with th
46、e following requirements: 1) The luminance factor shall be not less than80% of the minimum value specified in11.2.1. 2) The CIL value at an entrance angle of5 and an observation angle of012 shall be not less than80% of the relevant minimum value specified in Table 3. Colour Observation angle Entranc
47、e angle Vertical: H H H Horizontal: 5 left and 5 right 30 left and 30 right 45 left and 45 right Yellow 012 2 cd/lx 18 2 cd/lx 7 0.75 cd/lx 2.5 0.4 5) BS2662, “Grey scale for assessing change in colour” (contained in BS2661-86 & BS3661, “Methods for the determination of the colour fastness of textil
48、es”). 6) As defined in the proceedings of the1931 meeting of the International Commission on Illumination (CIE).BS AU 152:1970 4 BSI 02-2000 14 Bending and corrosion(See3.2) 14.1 Bending. In the case of marking plates constructed solely, excluding the letters, from all-metal back-plates laminated wi
49、th reflex-reflecting and fluorescent materials, a sample unit with, where appropriate, representative letters attached shall be bent around a50mm diameter mandrel to an included angle of90 and then flattened. Failure or detachment of the letters, where fitted, shall not constitute failure of the sample unit. 14.2 Corrosion resistance. The bent and flattened portion of the sample unit shall then be subjected to the action of a saline mist for50hours, comprising two periods of exposure of24hours each, separa
