1、BSI BS*LtOq 78 W 162qbb 0007170 b BS 4904 : 1978 UDC 69.022.324 : 72.017.4 : 535.6 British Standard Specification for External cladding colours for building purposes SpBcification relative aux couleurs des revetements extrieurs utiliss dans ia construction Spezifikation fr die Farben von Aufienbekle
2、idungen im Bauwesen Contents Foreword Cooperating organizations Specification 1. Scope 2. References 3. The colour range 4. Identification of colours 6. Matching Page Back cover 1 6. Munsell references Table 1. Colour range 1 2 Appendix 2 A. Approximate Munsell references 2 a (separate sheet includd
3、 in this package) Foreword This British Standard was prepared under the direction of the Elements and Components in Building Standards Committee to provide a range of coordinated colours for cladding. The standard is applicable to aluminium, asbestos-cement, glass, plastics, and steel cladding. It i
4、s hoped that it will also provide a basis for the coordination of colours of cladding in other materials such as concrete, brick, stone, and clay tiles. The colours in this standard, numbering thirty-eight, and including black and white, have been selected from BS 5252, which has been designed to im
5、plement colour coordination in the building industry, namely: (a) to bring the colours of building materials and finishes into a systematic relationship; (b) to combine economy in the number of colours used with sufficient flexibility to meet design and technical requirements. *Used with a back-up w
6、all or similar arrangement. British Standards Institution Page 3 2 1 Scope This British Standard specifies the preferred colours for external cladding in the following materials: aluminium asbestos-cement opaque glass* opaque plastics steel The standard includes colours for vitreous enamel for build
7、ing purposes selected from BS 4900 and colours for opaque plastics for building purposes selected from BS 4901 ; reference should be made to these standards. , _I_ - BSI BS*490c( 78 3624669 0004L3 8 m BS 4904 : 1978 2. References The titles of the standards publications referred to in this standard
8、are listed on the inside back cover. 3. The colour range The content of this derived colour range is given in table 1. The colours are identified by their code reference (see clause 4) in accordance with the requirements of BS 5252. The positions of the colours in the framework grid are illustrated
9、by the cut out apertures in the enclosed overlay which is keyed to register with the five-fold composite colour card included in BS 5252. Table I. Colour range O4 red light - - mid - 04D44 dark - Q4B29,04C39“, 84D45 08 yellow red light - 08B17,08C36 mid - 08825 dark - 08B27,08B29*, 08D46 10 yellow 1
10、2 green/yellow light - 10A03,10B19,10821 mid - IOB23,10C37, IOD44 dark - 10B27,10B29,10C39 light - 12B21 mid - 12825,12D44 dark - 12B29 14 green light - - mid - i4c37 dark - 14C39 18 blue light - 18B17, 18B21 mid - 18B25“, 18C37,18E53 dark - 18827,18829,18C39* 20 purple/blue neutral light - - mid -
11、- dark - 20D45 white - 00E55“ dark - 00813 black - 00E53“ light - 00A05“ NOTE I. Seven colours marked * are produced in all sheet cladding materials except opaque glass at the date of publication of this standard. NOTE 2. A recommended colour range for agricultural buildings is given in BS 5502 : Pa
12、rt 3 : Section 3.1 1 : 1978. BS 5252 relates the colours in terms of selected steps in the visual attributes of hue, greyness and weight. Hue is the attribute of redness, yellowness, blueness, etc. The framework has twelve horizontal hue rows, plus a further row for neutral colours (.e. without hue)
13、, numbered and named as follows. 0% red-purple 16 blue-green Q4 red 18 blue 86 yellow-red 20 purple-blue O8 yellowred 22 violet 10 yellow 24 purple 12 green-yellow 14 green 80 neutral Greyness is the estimated grey content of colours. The framework divides the colours into five groups, lettered A to
14、 E, representing steps of diminishing greyness as follows. GroupA grey Group I3 nearly grey Group C greyhlear Group D nearly clear Group E clear Weight is a subjective term for lightness modified as necessary to produce colours of the same character in different hues. The framework provides for up t
15、o eight vertical columns of colours of equal weight in each greyness group ranging from lightest on the left of the group to darkest or heaviest on the right. The columns are numbered in sequence from the left-hand column of A group (01) to the right-hand column of E group (58). The numbering is not
16、 regular across the eight columns in each group because some column numbers were established as standard in BS 4800. 4. Identification of coiours Each colour is identified by a three-part code taken from BS 5252 and these codes are to be used to identify the colours for purposes of specifying or ord
17、ering. The approximate Munsell references given in appendix A of this standard are for a different purpose, as explained in clause 6. (a) The first part of the identification code signifies hue and consists of a NUMBER with two numerals. (Neutral colours are designated OO.) (b) The second part signi
18、fies greyness and consists of a single LETTER. (cl The third part signifies weight and consists of a NUMBER with two numerals. Examples: O8 B 15,12 D 45,OO A 03. Thus codes with the same first pair of numerals identify colours in the same hue row, codes with the same letter indicate colours in the s
19、ame greyness group and codes with the same second pair of numerals identify colours in the same weight column. 2 5. Matching The colsur patterns in the composite card included in BS 5252 are shown in semigloss finish for visual indication of the colour in daylight. For matching purposes a fan contai
20、ning larger patches of all colours in that standard is available from BSI in BS 5252F. When using the larger patches it should be borne in mind that the relative appearance of surface colours is affected by the character of the light in which they are compared. Thus close matches under one illuminan
21、t may not be close under others, a phenomenon resulting from pigment differences and known as metamerism. It is recommended therefore that comparisons should be made under good diffuse daylight or under an illuminant which meets the requirements of BS 950 : Part I. Where such factors as surface text
22、ure, patterning, embossing or configuration prevent a direct match between the colours of a manufactured product and the colours in this standard, the latter shall be regarded as target colours to which the product colours should approximate as closely as possible, particularly in hue. 6. Munsell re
23、ferences Approximate Munsell references (see Munsell Book of Color published by the Munsell Color Inc., Baltimore, Maryland, USA), which classify the colours in terms of hue, value (lightness) and chroma (saturation) in that order, are given.in appendix A as a further guide to the visual properties
24、of the colours in this standard. They are for information only and are not to be used for specifying or ordering the colours. Since the colour patterns are not those of the Munsell Color Inc. and exact agreement cannot be guaranteed, all Munsell references given in this British Standard are approxim
25、ate only. The value figure in these references can be used to give an approximate estimate of the reflectance of each colour, as a percentage, by substituting it for V in the formula V(V - 1) e.g. the value figures in MunselI references 5Y 6/2 and N7 are 6 and 7 respectively which, substituted for V
26、 in the formula, give approximate reflectances of 30 % and 42 %. Standards publications referred to BS 950 BS 4800 4900 23 4901 Bs 5252 BS 5252F 5502 Artificial daylight for the assessment of colour Part 1 Illuminant for colour matching and colour appraisal Paint colours for building purposes Specif
27、ication for vitreous enamel colours for building purposes Specification for plastics colours for building purposes Framework for colour co-ordination for building purposes Framework for colour co-ordination for building purposes: colour matching fan Code of practice for the design of buildings and s
28、tructures for agriculture Part 3 Appendices legislation, technical data, relevant standards and other references Section 3.1 1 External colours for farm buildings 7- 3 BSI BSX4904 78 m LbZLIbb 0009373 3 m This British Standard, having been prepared under the direction of the Elements and Components
29、in Building Standards Committee, was published under the authority of the Executive Board on 29 December 1978. British Standards Institution, 1978 ISBN O 580 10455 9 Copyright Users of British Standards are reminded that copyright subsists in all BSI publications. No part of this publication may be
30、reproduced in any form without the prior permission in writing of BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols and size, type or grade designations. Enquiries should be addressed to the Publications Manager, 101 Pentonvill
31、e Road, London N1 9ND (Telephone 01837 8801; Telex 23218). BS 4904 : 1978 Contract requirements Attention is drawn to the fact that this British Standard does not purport to include all the necessary provisions of a contract. Revision of British Standards British Standards are revised, when necessar
32、y, by the issue either of amendment slips or of revised editions. It is important that users of British Standards should ascertain that they are in possession of the latest amendmonts or editions. The following BSI references relate to the work on this standard: Cornmittee reference ECB/22 Draft far
33、 comment 77/12609 DC Cooperating organizations The Elements and Components in Building Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: *Aluminium Federati
34、on *Asbestos Cement Manufacturers Association *Brick Development Association British Ceramic Research Association British Hardware Federation British Precast Concrete Federation btd. British Woodworking Federation Consumer Standards Advisory Committee of BSI Convention of Scottish Local Authorities
35、Repartment of the Environment - Interdepartmental Agrment Board British Plastics Federation Construction Development Group Department of the Environment (PSA) Establishment, Princes Risborough Laboratory Establishment Department of the Environment - Building Research Department of the Environment -
36、Housing and Construction Department of the Environment - Building Research Health and Safety Executive Institute of Building Control Institute of Quality Assurance Institution of Structural Engineers Mastic Asphalt Council and Employers Federation National Council of Building Materials Producers Nat
37、ional Federation of Building Trades Employers National Federation of Roofing Contractors *Royal Institute of British Architects Royal Institution of Chartered Sutveyors Scottish Development Department The Glass and Glazing Federation Trades Union Congress The organizations marked with an asterisk in
38、 the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: British Steel Corporation Cement and Concrete Association Metal Roof Beck Association Paintmalers Association of Great Britain Ltd. Timber Research and De
39、velopment Association Amendments issued since publication Arnd. No. Text affected P Co O P British Standards Institution . 2 Park Street London WlA 28s . Telephone Q1-629 9000 - Telex 266933 781 2-1.8k-8 BS 4904: 1978 UDC 69.022.324:72.017.4:535.6 Specification for External cladding colours for buil
40、ding purposes Appendix A A p p r ox i m at e M u n se I I ref er e n ces British Standards Institution 02 04 06 08 10 12 14 16 18 20 15 17 I9 21 23 25 27 29 02 red-purple 8.75 YR 012 08817 5 B 811 18 B 17 22 24 10 B 19 10 E 21 2.5 GY 612 12 E 21 5 Y 512 U 10 E 23 8.75 YR 412 7 O8 E 25 7 12 B 25 2.5
41、GY 412 8.75 YR 312 O8 B 27 5 Y 312 10 E 27 04 B 29 06 yellow:red 8.75 YR 212 O8 E 29 5 Y 212 10 B 29 2.5 GY 212 12 E 29 08 yellow-red I O yellow m v) H m v) * c JI O 12 green-yellow r: I 14 green f+ r N -L- 16 blue-green O O O , 18blue 18 B 21 18 E 25 18 E 27 18 E 29 20 purple-blue 22 violet 24 purp
42、le I O0 OO. neutral 7- 15 17 19 21 23 25 27 29 -I- Bsgroup Colours for external cladding BS 4904 : 1978 03 5 Y 810.5 c 10 A 03 1 05 03 P N7 KIA05 05 07 o9 II 13 14 O2 red-purple 04 red 06 yellow-red 08 yellow-red I O yellow - m VI -H m VI * c JI O 12 green-yellow 11 I I4 green 16 blue-green O O O I.
43、+ 4 0- 18 blue 4 I 20 purple-blue 22 violet 24 purple 1 O0 neutral - O0 A 13 ,- 1 -. 07 o9 11 13 14 Colours for external cladding BS 4904 : 1978 04 red 10 YR 417.5 U O8 D 45 04 D 44 04 D 45 06 yellow-red 08 yellow-red 5Y 6/10 o 10 B 44 2.5 GY 518 o 12D44 10. yellow i 2 green-yellow 14 green 16 blue-
44、green 18 blue 5 P8 318 o 20 D 45 49 50 51 53 55 56 57 58 02 04 06 08 10 12 14 16 18 20 22 24 10 B 4/10 18 E 53 o4 red 06 yellow-red _ 88 yellow-red 1 O yellow c 12 green-yellow I 14 green 16 blue-green 18 blue 20 purple-blue 22 violet 24 purple ci 0- N O O O JI ci 4 CP O I O0 ,I 00155 Soe3.4 in ES 5
45、252 : 1976) 50 E grhp 61 53 55 56 00 neutral u ao E 53 (See 3.4 in BS 5252 : 19761 58 57. Colours for external cladding BS 4904 : 1978 31 02 33 35 36 37 38 39 40 02 red-purple 1 04 C 39 O4 04 red 86 yellow-red 06 10 YR 716 u 08 08 yellow-red - m Y) H -08 C 35 I O yellow ,. m Y) * c -0 D c 4 m IO 12
46、12 green-yellow I t. 0- m r: 5 G 514 u 5 G 314 D. 14 14 green o- r Q 14 C 37 14633 O O O Q 16 16 blue-green t. 4 Q m I 7.5 B 5r4 . U 18 C 37 7.5 B 314 18 C 39 18 1.8 blue 20 20 purple-blue 22 22 violet . 24 purple . 24 O0 31 33 O0 neutral 38 I 35 36 39 40 -37 C - group - Colours for external cladding-BS 4904 : 1978
