[Alt-photo] Re: Was Sulfamic Argyrotype and toning

[Loris Medici]

Hi Sandy, I agree for Vandykes (same results here, since the beginning),
but I yet have to manage to get fully blue-black (from highlights to
shadows) gold toned prints with Argyrotype, the deepest shadows remain very
slightly warm against the mid tones and highlights... Perhaps it due the
addition of glycerin to the stock solution, do you add glycerin?

The shelf life / stability of the toner is good but can't be considered
stable; I haven't used toner older than 3 months, I mix 1000-2000ml small
batches... I do it that way since I saw gold deposits on the sides of the
bottle that was sitting around 5-6 months. (Maybe it started to deposit
earlier - I can't be sure, it was waiting my attention in the closet...)
OTOH, my gold salt is different than what you all use; I don't have access
to straight gold chloride (can't buy it locally) therefore I use locally
avaiable potassium tetrachloroaurate.

Regards,
Loris.


2013/5/15 Sandy King <sanking at clemson.edu>
>
> Loris,
>
> If you tone a vandyke or argyrotype print to completion with a gold
thiourea
> toner the deepest shadows should have a distinctive bluish-black color. If
> the tone that remains is slightly reddish/magenta/purplish the toner has
not
> done its job. The toner may be weak, or you might need to use more of it.
>
> I have noticed that some of the my batches of gold thioura toner do not
> seem to work as effectively  as in the past and have wondered what could
> be the cause. It would seem that the gold chloride, distilled water and
salt
> would remain stable, wonder if the chemical thiourea goes bad?
>
> Sandy
>
>
> On May 15, 2013, at 3:50 AM, Loris Medici wrote:
>
> > Hi Marek they look nice, thanks for sharing. The result with gold toner
> > look very much like what I get; somehow, you can't totally neutralize
the
> > warmth in the deepest shadows - a very dark and slight reddish / magenta
> > tint remains...