John -  [ and others due to the subject ]

As a retired (yea right) Sr. Scientist, perhaps I can be of help.

1. There are 4 but mostly short and long wave UV.

2. 254 nm  (nano-meter) wavelength UV is also called a sterilizing bulb.
    It is available in 18" small florescent bulbs.  I bout one for
    ionizing (erasing) EPROMs for computers in the 80's.  It can harm/burn
    the eyes if not taken with respect.

3.The sterilizing bulb can be bought and a holder - from an electrical
supply
or from a medical supply or barber supply...

4. Then there are the other dark blue ones - think black lamp poster :-)
   These lamps are often found at Hobby Lobby and poster/paint stores.

These might help show all sorts of things - soaps glow sometimes.  Cracks...

I recommend having both.  Since they are of different wavelengths they might
the better detect this or that.  More tools.

The four: (Handbook of Physics [Benenson, Harris, Stocker, Lutz]
(Springer publisher)

  10^-7 Meters
3.80...3.15                long wave UV         sudden pigmentation
380nm ...315nm
3.15... 280               medium-wave          formation of erythema
2.80....2.00             short-wave UV         bactericidal  [ the last
5 letters say it!] [ watch your eyes! ]
<2.00                     vacuum UV               ozonization

Getting into some of the odd frequencies would be costly.  Using XeF,
KrF or ArF in tubes (talk to semiconductor houses).

Another source that might get long and medium - (so you have 3) - is a
rock shop.  Rocks are beautiful...

They are typically small hand and often battery.    From a Google search
of rock shop Penn - I see Penn is
big on rocks!   So maybe you can find  a 2 frequency at one (or get a
lead to one) and a sterilizing lamp.

Martin

John wrote:
> I need to find source(s) for a UV light which will help me detect rare and
> uncommon shells which have been altered or doctored.  Can anyone make
> recommendations as to what type, and where they can be found?
>
> John Andrews
> Decal Specialties, Inc.
> 2495-C Blvd. of the Generals
> Norristown, PA  19403
> 484-674-2900
> 484-674-2903 (fax)
> [log in to unmask]
>
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--
Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net

http://lufkinced.com/

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