blue light ?

[milcollector]

can someone please direct me to a thread or site that explains how to set up a blue light device eg. what exactly do you need and where to buy it.
I want to check on the age of some photos.

Thanks kindly

[Tim DC]

You could search the forums on "blacklight" or "uv light"

[racheleh]

There are some for sale on ebay

here

and here

I bought mine at a philately shop (for stampcollectors), they had various sizes and pricerange.