Photoluminescent or glow in the dark products
Over the past decade, we have become
familiar with photoluminescent or glow in the dark products. We have seen novely items such as children pajamas,
toys at fair which glow and attract attention. We have also seen non-powered photoluminescent exit signs and arrows which direct individuals out of an office or hotel in
power failure situations. Further, use of photoluminescent ink on clothing, cars, plates and
posters is becoming more common. The use of photoluminescent paints on art--canvas and glass
are also gaining popularity. You may have also seen woven products which have been sewn or embroidered
with photoluminescent thread. Besides these areas, photoluminescent products
are finding applications in security and tamper-evident markers.
| photo in light
|| photo in dark
What is photoluminescence or
glow in the dark?
Photoluminescence is a process where
a material aborbs photon energy (light) at one wavelength; stores it by exciting an electron to a higher energy
state; photoluminescence (light emission) is observed when the excited electron returns to the lower energy
state. The typical process of excitation and light emission takes 10s of seconds. By arrangement of molecules via
doping with additives, one can extend the photoluminescent periods to more useful time scales of 10 minute to 20
hours. The rocks below show photoluminecence as they are photographed in the dark.
At one time, photoluminescent pigments used to be radioactive.
No more. These products are typically pigmented with strontium
aluminate or doped zinc sulfide. These materials are safe for use.
What are some interesting applications of
My favorite is the football pictured above. Remember
all the times when it became too dark to see the football and the game was tied. Now, you can continue
playing for atleast 30 minutes longer.
At Photoluminescent.com, we plan to be a key lead generation site
for everything photoluminescent. This includes photoluminescent pigments,
photoluminescent masterbatches, photoluminescent inks, photoluminescent paints,
photoluminescent signs, photoluminescent film,
photoluminescent tape, photoluminescent thread and others. If you would
like to list your company with us or are interested in sourcing a commercial quantity of product, send us a message.
Visit our Photoluminescent Products news page for latest
information on glow in the dark products.
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