| Hi Rodolpho,
Did you purchased the selenium in Curitiba?
Joao On 02/10/2009, at 10:45, Rodolpho Pajuaba wrote: If I remember well from my Photographic Formulary book, a selenium toner can be done by mixing the selenium with sodium sulfite (in portuguese, sulfito de sódio, I don't know what it translates right; it's the usual one, so often used in many photographic formulas), in warm water. There is a precipitate that I never managed to get rid of, but I kept it and it never did any harm. Of course I could have filtered it, but I (naively) think that if I did I could nullify the effect ;-) . And yes, it's probably toxic (I'll let the ones that really know say something here), but if you do it in a ventilated environment I think it won't do you no harm.
Regards,
Rodolpho Pajuaba
2009/10/2 <C.Breukel@lumc.nl> For a fixer free selenium toner see:
http://www.jackspcs.com/t55.htm
Beware that Se is toxic, only do this when you know what you are doing
and have the right equipment
On gold: when economy goes down people start to buy gold, the gold price
has increases considerably
Best,
Cor
Joao Ribeiro (11) 9607-2106 |