1、BSI BSm5252F 76 = Lb24bb OOO57 b L _= - _ - BS 5252F : 1976 Framework for clour eo-ordination for building purposes ., Colour -_ .matching fan - - -. . British Standards Institution , BS 5252 F Framework for colour co-ordination Colour matching fan . for building purposes 1. Introduction This fan co
2、ntains patches 64mm square of all the colours in the BS 5252 The fan does not constitute a range of colours for any one product. A colour is . ony standardized by its inclusion in a . derived standard such as those for paint (BS 4800). vitreous enamel (BS 49001, PBS 49021, and should only be specifi
3、ed by reference to those standards. Attention is drawn to the matching cards, site A6, issued for BS 4800, which must be used for matching paint coiours. 2 Colour Identification and arrangement Beneath each colour is printed in bold type its ES 5252 identification code and in lighter type its approx
4、imate Munsell reference. The latter is included only as a further guide to the properties of the The BS 5252 identification code is to be used for specifying or ordering purposes in combination with the relevant derived standard number (e.9. BS 4901 for a The code has three parts which locate the co
5、lour in terms of the hue rows, greyness groups and weight columns of the BS 5252 framework. The first part is a two-figure number for its hue row, the second a . letter for Its greyness group and the third a two-figure number for its weight column (see BS 5252 for definition of hue, grey- ness and w
6、eight). The colours in the fan ar arranged in greyness groups A to E separated by plain cards. Within these groups colours follow the hues down each weight column in turn, . framework. . . lastics (6s 49011, sheet and tile flooring . colours. _colour in the plastics standard). . * E . 3. Matching .
7、When using the fan for matching, 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 be close under others, a phenomenon known as metamerism. It is recommende
8、d there- fore that comparisons should be made under good diffuse daylight or under an illuminant which meets the requirement of Part 1 Illuminant forcolour matching and colour appraisal of ES 950 Artificial daylight for the assessment of colour. For applications for interior use, samples should also
9、 be compared with the individ- ual patches under tungsten light in order to detect severe metamerism. To aid matching it will be necessary to abscure patches adjoining the one in use. For this purpose a grey mask is included with the fan. 4. Caution The colours in this fan may change with time. It i
10、s therefoie important to keep the fan out of the light except when in use and avoid handling the pitches themselves. NOTE IT IS NOT POSSIBLE TO REPRODUCE ON FILM THE COLOUR PATCHES THAT ARE CONTAINED IN THIS SPECIFICATION. THE TEXT IS REPRODUCED HOWEVER TO INDICATE THE SCOPE AND INTENTION OF THE STANDARD.
