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Colour filter
A material placed in a light beam to change its colour or spectral content. Often called a gel, it is usually identified by a manufacturer’s name and code, which provide a more precise reference than a colour description alone.
A material placed in a light beam to change its colour or spectral content. Often called a gel, it is usually identified by a manufacturer’s name and code, which provide a more precise reference than a colour description alone.
First published 7 September 2026 · Revision 1 · Substantive changes to this entry are dated here.