[pure-silver] Re: substitute for commercial gold toner
- From: "janet ness" <nessj@xxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Thu, 9 Dec 2004 01:40:55 -0800
BTW, I recently received an email message from Silvershotz International
Gallery in Woolloongabba Australia stating that Fotospeed Australia has now
closed and that all products are now available from FOTO RIESEL in Sydney. The
Black and White Enthusiast magazine is now available from Silvershotz. I hope
that Fotospeed products will indeed remain available.
Janet Ness
----- Original Message -----
From: anclancy@xxxxxxxxxxx
To: pure-silver@xxxxxxxxxxxxx
Sent: Tuesday, December 07, 2004 8:06 PM
Subject: [pure-silver] Re: substitute for commercial gold toner
i will check this out. Where did you find the MSDS? Never crossed my mind to
use that as a reference.
I will check the Morgan and Morgan Index tomorrow when i go into the lab to
see if they list the formula for this toner.
I believe Tim Rudman list a direct gold-thiocarbamide toner that also
contains citric acid,however it has a very short life after mixing.
Thanks to all .
ann
-------------- Original message --------------
>
> ----- Original Message -----
> From:
> To:
> Sent: Tuesday, December 07, 2004 11:04 AM
> Subject: [pure-silver] substitute for commercial gold toner
>
>
> > Have been using Fotospeed gold toner and am looking for
> > formula that i can mix my self , as i have on hand a wide
> > variety of chemical used for other gold toners. This toner
> > is being used after selenium for extended times, long
> > extended times with no color shifts.
> > Fotospeed does not list the basic ingredients as do many
> > other makers so I don't know what they are using that
> > makes it so stable that it can be used, put away and then
> > re-used again.
> >
> > I have been doing a lot of research and have almost every
> > known formula. Have also talked with the Formulary
> > regarding their kits to determine what would be a similar
> > substitute.
> >
> > It has boiled down to GAF 231 or perhapes GP-1.
> >
> > Both contain basically the same chemicals; in varying
> > amounts. I have used GP-1 when doing split toning
> > (Jonathan Bailey's version) but it is also recommend for
> > basic protection rather than a color shift. 231 can and
> > will produce a color shift but it's discription is similar
> > to the one found on Fotospeeds directions. One indicates
> > the use of Ammonium thiocyanate altho Sodium thiocyanate
> > may be subsituted. the other indicates sodium thiocyanate
> > with Potassium thiocyanate may be subsituted. In my Morgan
> > and Mortgan index all version of thiocyanate indicate
> > their can be a substitution of any the other types.
> > My question is does it make a difference (am not a
> > chemist, so i don't know)? What i do know is that there is
> > huge difference in cost.
> >
> > It would be nice to find a substitute that could be mixed
> > and have on hand to use at a moments notice, which is one
> > advantage that Fotospeed provides.
> >
> > Any thoughts?
> >
> > regards,
> > ann clancy
> >
> The MSDS for the Fotospeed Gold toner indicates it
> contains Thiourea (AKA Thiocarbamide). I think this is what
> is used in Kodak GP-2, a gold toner intended for image
> protection of microfilm. I don't remember seeing another
> Gold toner of this type but there probably are others.
> I don't know how much if any difference the type of salt
> makes with thiocyanate, my guess is little or none.
>
> ---
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@xxxxxxxxxxxxx
>
>
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