The reflectance spectrum of commercially available theater gel filters can
be viewed at:
<http://www.leefilters.com/index.asp>
click on any of the lighting filters.
They are not narrow band filters.
Note that these filters do not work for demonstrating standard subtractive
color mixing, even though both Arbor Scientific and Edmund Scientific sell
selected theater gels for this purpose.
It is better, as mentioned by John Clement, to make your own cyan, magenta,
and yellow filters by printing them with an ink jet printer, using ink jet
transparency paper.
Larry Woolf
General Atomics
3550 General Atomics Court
Mail Stop 78-110
San Diego CA 92121
Ph:858-526-8575
FAX:858-526-8568 http://www.ga.com http://www.sci-ed-ga.org