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Old 22nd February 2021, 12:25 PM
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Bob Bob is offline
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Join Date: Aug 2008
Location: London(ish)
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Welcome aboard.

Glass blocks UV-B but allows most UV-A through. I believe wavelengths in the UV-A range are what alternative processes require so pretty much any glass should do the job. A green tint should not be an issue as UV wavelengths are a long way from green.

However, a green tint might affect silver based variable contrast papers as they use green to control the low-contrast exposure but I don't know if the very feint tint in window glass would be enough to make a noticeable difference.

That's the theory, but I do not use alt. procs so I leave it to others to provide the practical!

The only caveat I might make is that window glass breaks in dangerous ways so if it will be used by little hands, perhaps go for toughened safety glass.

Cheers, Bob.

Last edited by Bob; 22nd February 2021 at 12:32 PM.
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