James wrote:
> /BL tubes are a better choice than /BLB. The Woods glass used to block visible light in the /BLB also blocks some of the UV output.
These aren't Wood's Glass -- I've got an F4T5/BLB somewhere, which is a
deep purple/black colour when switched off; these tubes are off-white
and look like normal white-light fluorescent tubes. Well, aside from the
blatantly obvious "WARNING: EMITS UVA LIGHT WHEN OPERATING -- AVOID
PROLONGED EYE OR SKIN EXPOSURE" warning on one end of the tube.
According to the specsheet I've got, "350BLB" means it's a 350nm
blacklight (near-UV / UVA) tube with a strong UV emission. Pretty much
exactly what you'd want for photoresist. Sold for use in fly-killers,
interestingly enough.
--
Phil.
ygroups@...http://www.philpem.me.uk/