1、BSI BSm5252 76 W Lb2Libb4 0004947 T W e BBO BS 5252 : 1976 UDC 691 : 72.017.4 : 535.6 (083.6) British Standard Framework for colour co-ordination for building purposes Canevas pour la coordination des couleurs dans le btiment Raster fr Farbkoordinierung fr Bauzwecke 0 Contents Foreword Cooperating o
2、rganizations I. Scope 2. Identification of colours 3. The framework Page 1 4. Application Back cover 5. Matching 6. Munsell references 2 2 Appendix 2 A. Approximate Munsell references (separate sheet included in this package) Foreword This British Standard provides the framework for colour co-ordina
3、tion in the building industry, the aims of which 0 are: (a) to bring the colours of buiiding materials and finishes into a systematic relationship; (b) to combine economy in the number of colours used with sufficient flexibility for meeting design and technical requirements. This British Standard is
4、 not a document for specification purposes, therefore any colour shown can only be termed a British Standard colour when it is included in one or more of the derived British Standards for particular products or functions (a list of the derived standards and other ranges for specification purposes is
5、 given in the footnote to clause 4 and in the list of publications referred to. The framework provides for a large number of colours related systematically in terms of the visual attributes of hue,greyness, lightness and weight (see clause 3). From the total number of colours which the framework wil
6、l accommodate, 237 have been seiected to meet building colour requirements as a whole as economically as possible, including those for artificially coloured interior and exterior Page 3 3 3 materials, factory finished components, furniture and furnishings. The framework is not intended as a source o
7、f colours for identification purposes. Colours for such purposes are dealt with separately in, for example, BS 381C and BS 1319. The Munsell colour system was used in structuring the framework and all colours selected for this standard are notated in terms of this system (see clause 6 and appendix A
8、). It was found, however, that for consistency of appearance in the different groups and columns of colours in the framework it was necessary to identify and use two additional colour attributes, greyness and weight. It is emphasized that these two attributes are extra to those of the Munsell system
9、 and do not supplant them. The framework and the concept of colour co-ordination which it serves are based on research at the Building Research Establishment, Department of the Environment (for further information see the BRE report SO13 Colour Co-ordination Handbook by H L Gloag and M J Gold, publi
10、shed by HMSO, 1979). Compliance with a British Standard does not of itself confer immunity from legal obligations. British Standards Institution AMD 571 1 BSI BSx5252 76 9 3624669 0009948 L D BS 5252 : 1976 1. Scope This British Standard establishes a framework within which 237 colours have been sel
11、ected as the source for all building colour standards and the means of co-ordinating them. It is not itself a range of colours for any particular product and is not to be used to specify British Standard colours. A colour is only standardized when it is included in another British Standard, such as
12、those that have been derived for paints (BS 4800), vitreous enamel (BS 4900), plastics (BS 4901) and sheet and tile flooring (BS 4902). Such standards contain only a proportion of the total colours in this British Standard, selected to meet design requirements within relevant technical and economic
13、constraints. NOTE. The titles of the publications referred to in this standard are listed on page 3. 2. Identification of colours Each colour is identified by a code which indicates its position on the framework and consists of three parts. (a) The first part signifies hue and consists of a NUMBER w
14、ith two digits (neutral colours are designated 00). (b) The second part signifiesgreyness and consists of a single LETTER. (c) The third part signifies weight and consists of a NUMBER with two digits. Examples: 08 B 15,24 E 53. Thus codes with the same first pair of numerals identify colours in the
15、same hue row, codes with the same letter indicate colours in the samegreyness group and codes with the same second pair of numerals identify colours in the same equal weight column. All derived standards specifying colours will use the same codes for the colours as given in this British Standard. Th
16、ey will also record the same approximate Munsell references for the colours as are given in appendix A. Colours which fit into blank spaces in the framework have a Co-ordinated relation to the published colours but cannot be regarded as British Standard colours. They may be referred to by their appr
17、oximate Munsell reference, but not by the three-part identification code they would have if included in this standard. 3. The framework The framework locates and relates the colours in terms of the visual attributes of hue, greyness, lightness and weight and it is structured with the aid of the Muns
18、ell colour system (see clause 6). 3.1 Hue. Hue is the attribute of redness, yellowness, blueness etc. The framework has twelve horizontal hue rows in spectral sequence, plus a further row for neutral colours (.e. without hue), numbered and named as follows: 02 red-purple 16 blue-green 04 red 18 blue
19、 06 yellow-red 20 purple-blue 08 yellow-red 22 violet 10 yellow 24 purple 12 green-yellow O0 neutral 14 green The specific hues have been selected to represent all main regions of hue and to produce as many harmonious combinations as possible. Two yellow-red rows are included, one (06) of reddish br
20、owns to harmonize with reddish woods, stones, bricks, etc., and the other (08) of yellowish browns to harmonize with yellowish woods etc. 3.2 Greyness. Greyness is the estimated grey content of colours. Greyness diminishes as Munsell chroma increases, but the relationship is not regular. The framewo
21、rk divides the colours into five groups, lettered A to E, representing steps of diminishing greyness as follows: GroupA grey Group B nearly grey Group C grey/clear Group D nearly clear Group E clear 3.3 Lightness. Lightness is the attribute by which surface colours appear to reflect a greater or les
22、ser amount of the incident light. White has highest lightness, black has lowest lightness; all other colours have lightness in between these extremes. The framework provides for up to eight vertical columns in each greyness group from high lightness on the left to low lightness on the right. NOTE 1.
23、 To meet practical requirements in the middle lightness region of E group, where hue discrimination is at its peak, column 55 serves as an extension of column 53. NOTE 2. The numbering of columns across the whole framework is not regular because certain numbers were standardized in BS 4800 before pu
24、blication of BS 5252 but whilst it was a Draft for Development, DD 17. 3.4 Black and white. Both black and white are clear colours and therefore belong to E group. They are at opposite extremes of lightness outside the range of the eight columns of the group and should properly have positions of the
25、ir own on the right and left hand sides respectively. Owing to limited space in the colour card they are shown at the foot of columns 49 and 58 respectively and numbered accordingly. 3.5 Weight. Weight is a subjective term for the relative character of colours of differing hue, as determined by thei
26、r greyness and lightness. The colours in each individual column in the framework have been selected to have the same weight, .e. to offer colours of the same character in the different hues represented, To have the same weight colours are required to have the samegreyness and be adjusted as necessar
27、y in lightness. The variations of lightness for the same weight in any column of colours are indicated by the value figures in the approximate Munsell references for all framework colours in appendix A (see also clause 6). Weight is used in the framework solely to regulate the appearance of the colo
28、urs within a given column. It is not used for relating one column to another for which purpose lightness is used, as indicated in 3.3. AMD 571 11 2 4. Application In general, derived colour standards* will be of two kinds: O those which specify colours for one particular type of material (e.g. paint
29、s, plastics, vitreous enamels) and those which specify colours for a particular use but are not tied to one material (e.g. colours for farm building exteriors, school furniture and equipment, flooring materials). The derived standards* are published in the form of masks, which, when laid over the fr
30、amework, expose the colours of each derived standard. Selection of colours from this standard for derived standards should be based on the following considerations. (a) Technical and economic constraints on the choice and number of colours included, taking into account durability in use. (b) The int
31、ended functions of the colours and hence their appropriateness in terms of the different categories of hue, greyness, lightness and weight (see clause 3). Small scale surface pattern or pronounced texture or both, as with some floor and wall coverings, may prevent matches of the plain colours in thi
32、s standard. In such cases a clear statement will be given in the text of relevant derived standards that for reasons of pattern and texture the standard colours are to be regarded as target colours only. In the case of small scale surface patterning, relation with the target colours will be in terms
33、 of the composite or dominant colour of the pattern, not in terms of the small individual colours that make up the pattern. 0 5. Matching The colour patterns in the accompanying card are shown in semi-gloss finish for visuai indication of colour in daylight. For matching purposes a fan (BS 5252F) co
34、ntaining larger patches of all colours in this standard is available from BSI. When using the large 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 illuminant may not
35、 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 1, For applications for interior use, samples
36、should also be compared with individual cards under tungsten light in order to detect severe metamerism. 6. Munsell references Approximate Munsell references (see Munsell book of color, published by the Munsell Color Inc., Baltimore, USA), which classify colours in terms of hue, value (lightness) an
37、d chroma (saturation) in that order, are given in appendix A as a further guide to the visual properties of the colours in this British Standard. They are for information only and are not to be used for specifying or ordering colours. Since the colour patterns are not those of the Munsell Color Inc.
38、 and exact agreement cannot be guaranteed, all Munsell references given in this British Standard are approximate 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 - I)
39、, e.g. the value figures in the Munsell references 5Y 6/2 and N7 are 6 and 7 respectively which, substituted for V in the formula, give approximate reflectances of 30 % and 42 % respectively. Publications referred to BS 381Ct Specification for colours for identification, coding and special purposes
40、BS 950 Specification for artificial daylight for the assessment of colour Part 1. Illuminant for colour matching and colour appraisal BS 1319t Specification for medical gas cylinders, valves and yoke connections BS 4800 Specification for paint colours for building purposes BS 4900 Specification for
41、vitreous enamel colours for building purposes BS 4901 Specification for plastics colours for building purposes BS 4902 Specification for sheet and tile flooring colours for building purposes BS 4903 Specification for external colours for farm buildings BS 4904 Specification for external cladding col
42、ours for building purposes BS 5252F Colour matching fan: framework for colour co-ordination for building purposes PD 6491 Preferred exterior colours for static caravans S013t* Colour co-ordination handbook, H L Gloag and M J Gold Munsell book of color, published by Munsell Color Inc., Baltimore, USA
43、. *To date, British Standards for colour ranges derived from BS 5252 and published are BS 4800, BS 4900, BS 4901, BS 4902, BS 4903, BS 4904 and PD 6491. tReferred to in the foreword only. *Available from The Building Research Station, Garston, Watford, Herts WD2 7JR. 3 AMD 571 11 BSI BS*5252 76 lb2L
44、ibb7 0007750 T Arnd. No. 571 1 BS 5252 : 1976 Date of issue Text affected Entire text replaced This British Standard, having been prepared under the direction of the Council for Building and Civil Engineering, was published under the authority of the Executive Board on 30 June 1976. British Standard
45、s Institution, 1976 ISBN O 580 08771 9 The following BSI references relate to the work on this standard: Committee reference 811 17. implementing the standard, of necessary details such as symbols and size, type or grade designations. Enquiries should be addressed to the Publications Manager, BSI, L
46、inford Wood, Milton Keynes MK14 6LE. The number for telephone enquiries is 0908 220022 and for telex 825777. Contract requirements. 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. Bri
47、tish Standards Institution. Incorporated by Royal Charter, BSI is the independent national body for the preparation of British Standards. It is the UK member of the International Organization for Standardization and UK sponsor of the British National Committee of the International Electrotechnical C
48、ommission. In addition to the preparation and promulgation of standards, BSI offers specialist services including the provision of information through the BSI Library and Standardline Database; Technical Help to Exporters; and other services. Advice can be obtained from the Enquiry Section, BSI, Mil
49、ton Keynes MK14 6LE. telephone 0908 221 166, telex 825777. Copyright. Users of British Standards are reminded that copyright subsists in all BSI publications. No part of this publication may be reproduced in any form without the prior permission in writing of BSI. This does not preclude the free use, in the course of Revision of British Standards. British Standards are revised, when necessary, by the issue either of amendments or of revised editions. It is important that users of British Standards should ascertain that they are in possession of the latest amendments or editions
