|
Hi Rodolpho,
There are many companies that make and sell
selenium in powder in Brazil. I've being making the selenium toners for years
and also taking selenium pills :-)). selenium is used for making red
glass. Making gold chloride like Joâo is trying to do is no big deal, as long as
you know how to handle all the chemicals, if you are a neophyte stay away. Don't
try to be a purist, the hole beauty of alt process is it's
inconsistency.
Jacques
----- Original Message -----
Sent: Friday, October 02, 2009 10:45
AM
Subject: Re: haunted VDB
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
No virus found in this incoming message.
Checked by AVG -
www.avg.com
Version: 8.5.409 / Virus Database: 270.14.3/2411 - Release
Date: 10/03/09 06:20:00
|