Loris,
did you note anything different between Au(I) and Au(III) toned prints (hue,
speed, etc.)?
From a theoretical point of view, though the m.w. is almost the same, the
substitution of Ag by Au is three times more efficient when using Au(I)
solutions.
Alberto
> A note about gold chloride (AuCl3): one can also use KAuCl2 (which is used
> in gold plating industry, AFAIK) perfectly for gold toners. For me (a person
> located in Istanbul) KAuCl2 is cheaper and easier to find (just a short
> visit to the gold sellers in Grand Bazaar). I use the thiourea-gold formula
> replacing AuCl3 with KAuCl2. The gold percentage difference is extremely
> small (AuCl3 -> 64.94% vs KAuCl2 -> 64.16%), therefore you can substitute
> AuCl3 with KAuCl2 using the exact amounts stated in the formula.
>
> Just my 2 cents,
> Loris.
Received on 05/19/06-11:53:34 PM Z
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