I'm aware that collodion has a sensitivity to UVA and blue wavelengths, and that it drops off well before the red end of the spectrum. Orthochromatic film _seems_ to be of a similiar sensitivity in that it is not sensitive to red, and goes well into the UVA frequencies and deeper; a range of around 200nm through to ~500nm (?). I have built a 4x5 wetplate camera constructed from red perspex which has proved to work quite well with wet plate, as long as I keep it out of the sun as that dries the collodion out too quickly.

The question is would it work as well for ortho film? or x-ray film for that matter? It should do, but I would appreciate thoughts from others.

Thanks, Peter.