Re: gold print

Loris,
You are correct, at low RH the color will be pink to red, with little
printout, at higher humidity it will shift toward blue and finally black or
greenish black. I use weak citric acid, typically 0.5 to 1% as one shot
developer. DIssolved gold chloride from the print will continue reducing in
the developer giving it a pink cast and staining subsequent prints.
I use a clearing bath that is sodium EDTA, citric acid, sodium bisulfite
mix, about a teaspoon each to a liter. It clears many prints. The color of
the print will change in the clearing bath, maybe further development takes
place there.
Marek

>From: Loris Medici <mail@loris.medici.name>
>Reply-To: alt-photo-process-l@usask.ca
>To: alt-photo-process-l@usask.ca
>Subject: Re: gold print
>Date: Wed, 14 Jun 2006 23:17:08 +0300
>
>Well, I will try this with KAuCl4 (and maybe NaOW) tomorrow. I like the
>color very much - I'm very excited!
>
>Since KAuCl4 = 377.8765 g/mol and Ammonium Iron(III) Oxalate = 374.0212
>g/mol. I will simply mix 20% of each (omitting 1% molar mass difference)
>and try to print some test strips mixing 1:1.
>
>Marc (and Marek), I guess the reddish/pinkish colors are obtained when the
>RH of paper is low (below %40). Am I right? Probably the printout won't be
>strong at this RH... What developers do you use? Or, do you use any
>developer? (Mike Ware's article mentions 1% Citric Acid, Oxalic Acid and
>IIRC Tartaric Acid for New Chrysotypes). How many steps of development I
>should expect?
>
>Can you (both) please elaborate some details such as RH and printout
>degree, color, developer(s)?
>
>Thanks in advance,
>Loris.
>
>----- Message from marekmatusz@hotmail.com ---------
> Date: Wed, 14 Jun 2006 18:05:35 +0000
> From: Marek Matusz <marekmatusz@hotmail.com>
>Reply-To: alt-photo-process-l@usask.ca
> Subject: Re: gold print
> To: alt-photo-process-l@usask.ca
>
>
>>That does seem like a lot of gold. There also seems to be a mismathch
>>of gold and iron. If I recall correctly the new chrysotype would be
>>about 0.8 g of gold chloride in 6 ml of water (I dont have my notes
>>handy). I use the same gold solution to make prints without the use of
>>the new chrysotype chemistry, just gold solution and FAO. I don't doubt
>>that the formula that you used worked (nice print), but it aseems that
>>a lot of gold was simply wasted and washed away in the processing.
>>Gold is very expensive again
>>Marek, Houston
>>
>>
>>>From: marc bruhat <m.bruhat@free.fr>
>>>Reply-To: alt-photo-process-l@usask.ca
>>>To: alt-photo-process-l@usask.ca
>>>Subject: Re: gold print
>>>Date: Wed, 14 Jun 2006 18:14:59 +0200
>>>
>>>yes! in part A.
>>>
>>>
>>>
>>>----- Original Message ----- From: "Michael Koch-Schulte"
>>><mkochsch@shaw.ca>
>>>To: <alt-photo-process-l@usask.ca>
>>>Sent: Wednesday, June 14, 2006 3:28 PM
>>>Subject: Re: gold print
>>>
>>>
>>>>Is that right? 6 ml. of H20 for every 1 g. of gold chloride?! Ouch!
>>>>
>>>>~m
>>>>
>>>>----- Original Message ----- From: marc bruhat
>>>>To: alt-photo-process-l@usask.ca
>>>>Sent: Tuesday, June 13, 2006 2:54 PM
>>>>Subject: Re: gold print
>>>>
>>>>
>>>>Dear Loris, thank you for this news but I no longer in fact, it was just
>>>>an
>>>>experience.
>>>>The formula was :
>>>>
>>>>
>>>>A-
>>>>
>>>>water : 6 ml.
>>>>gold chloride: 1 gr.
>>>>
>>>>B-
>>>>
>>>>Eau distillée : 300 ml.
>>>>ammonium ferric oxalate: 100 gr.
>>>>water to make 500 ml.
>>>>
>>>>Mix :
>>>>
>>>>Solution A : 6 ml.
>>>>Solution B : 5,5 ml.
>>>>----- Original Message ----- From: Loris Medici
>>>>To: alt-photo-process-l@usask.ca
>>>>Sent: Tuesday, June 13, 2006 11:30 AM
>>>>Subject: RE: gold print
>>>>
>>>>
>>>>Hi Marc, it's beatiful. From your explanation, I understand this is
>>>>P.O.P.
>>>>Palladium / Ziatype "sans Palladium" right? Have you tried to add Sodium
>>>>Tungstate (NaOW) to the coating solution? NaOW is used to lower the
>>>>emulsion
>>>>contrast in P.O.P. Palladium / Ziatype. Certainly that will have an
>>>>effect
>>>>over the image color (it warms the color w/ Palladium) but I think it's
>>>>worth to try - to see what happens. BTW, what was the strenght of the
>>>>gold
>>>>solution? (5%?)
>>>>
>>>>Regards,
>>>>Loris.
Received on 06/15/06-12:03:46 PM Z