The `Radium Girls` were instructed to, assured Radium was harmless
It killed its discoverer Marie Curie and continues to present a hazard
all over the place, Forth coastline, Scotland, has radioactive
hotspots from burning scrapped aircraft dials on the shore.
Tritium is very good, but expensive.
Zinc Sulphide is the dissapointing old glow in dark stuff.
Strontium Aluminate is much, much more effective, non radioactive,
glows for easy 8 hours , intially brighter than tritium.
Photoluminescent is the phrase if you want it by the litre, its used
as way to safety markers on things like oil rigs, smaller bits , any
number of vendors like
personally had good luck with poundland clocks, get the brushes while
your in ;-)
Not entirely. Some time ago (perhaps now 10 years) I wanted such a
watch. I went through a number (agreeing with the supplier they'd come
back to him if they were not really "luminous") till I tried a Sekonda.
The hands were luminescent but *the dial was properly luminous*. So I
wrote to Sekonda, asking how they managed this and whether they could
source luminous hands. They could and did; I could not have had better
service. When years later it broke they fixed it FOC, and told me that
they had also replaced the battery as a courtesy.
I thought their slogan was a joke, but it's been absolutely right IME:
"Beware expensive imitations".
Douglas de Lacey
The ones with crappy luminous paint are easy to get from the usual
places. If you want one that really works though, you'll need spend some
money and get a tritium one:-
A bit of digging might get you one closer to home. try Googling for
Luminox, Traser or Tritium
I don't know about that but we have an alarm clock that displays the
time in red on the ceiling of our bedroom. it's not bright enough to
disturb our sleep but it's great if you wake in the night and want to
know what timwe it is.
See: (Amazon.com product link shortened)
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