Re: Lighting for Platinum/palladium Alt proc Work Area
We have some VHO (very high output) flourescent lamps in our building - for growing plants. Out of curiosity I exposed some cyanotypes under these lamps - found they emitted almost as much UV light as my flourescent UV lamps. I think most regular flourescent lamps don't emit much UV, but I don't think its safe to assume they don't emit any UV light. A flourescent lamp is essentially a mercury vapor lamp with phosphors coating the tube to flouresce - ie to absorb UV light and emit a different wavelength - usually visible. In order for a flourescent lamp to work, it must produce UV light. If you want to use a flourescent lamp for coating an Encapulite safelight sleeve might be a good idea. These are sleeves that fit over a flourescent tube and filter the light emitted. See http://www.flexopress.com/production/encapsulitelightsleeves.html - filter # ENC-SOUVC* - blocks everything above 380nm.