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The e-ILV provides free access to all the terms and definitions contained in the international standard CIE S 017:2020 ILV: International Lighting Vocabulary, 2nd edition.

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17-31-100

backing board, <of a sign>

backboard, <of a sign>

surround or extension to a sign used
- to improve conspicuity of a sign by increasing its size and isolating it from its background;
- to improve conspicuity of a sign by virtue of the colour of the backing board;
- to reduce the effects of glare when the Sun is low and behind the sign

Note 1 to entry: This entry was numbered 17-69 in CIE S 017:2011.

Publication date: 2020-12
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