Any thin semi-transparent plastic and glass items that can be placed in a light beam to modify its colour and/or create a frost effect is classified as a filter.
<Filter Identifier="a5418bd3-07e4-404a-ba35-f34f9ab3a4dc" Version="3" VersionDate="2018-06-27" Brand="Rosco Supergel" Code="R23" Name="Orange"> <Color> <sRGB Red="255" Green="109" Blue="0" /> <CIE1931 x="0.618" y="0.372" Y="0.3895" K="2856" /> </Color> <HorizontalFrost>0</HorizontalFrost> <VerticalFrost>0</VerticalFrost> </Filter>
Above: Rosco Supergel R23 filter.
||The name of the manufacturer.|
||An optional part code.|
||An optional descriptive name.|
||An optional designation in the absence of a part code or descriptive name. This is normally a combination of the fixture, wheel and slot position it can be found in.|
A filter’s colour is given in sRGB and sometimes also in CIE 1931.
||The sRGB colour space colour of the filter as measured with a D65 light source.|
||The CIE 1931 colour space chromaticity of the filter (as measured using a light source with a CCT of
||The transmission of the filter.|
||The CCT of the light source used to measure the chromaticity.|
Frost is specified with the two
VerticalFrost elements. Their values range from 0.0 to 1.0, which corresponds to no to full frost.