Lens design in the EU or for anything marketing to the EU has had to change due to ingredient
restrictions, including radioactive or toxic. Some excellent lenses have disappeared from new mfg
due to this. The classic dye transfer color prining process used a Thorium mordant. Some of us have
substituted uranyl nitrate (lab grade yellowcake). Can cause a customs issue in certain cases, but 100g per purchase is really silly to question, because it would take shiploads of the stuff to make
a dirty bomb.
What about Thorium toothpaste http://www.orau.org/ptp/collection/q...toothpaste.htm, the mind boggles.
A overview of photographic lenses containing radioactive elements:
a friend in college used to tell me about artists who would buy any sort of fiestaware they could find, knock offs, the real thing
and grind down the paint to make their own radioactive gazes ... from what i remember, it requires a government permit
as a nuclear power facility ( or something like that ) because of handling issues ... this was told tome 25 years ago, i might be mis-remembering what he said ;)
brazil nuts have amounts of selenium in them too
and according to dr house too many brazil nuts
can cause poisoning that looks very much like radiation poisoning
you just need a moth larva antidote, it works well as a tea
and counteracts both poorly advised chemotherapy as well as the selenium.
it would be good kodak or ilford or ?? sold moth larvae with every container of
selenium toner, it might come in handy ! ;)