[alt-photo] Re: Gold chloride in Pt/Pd sensitizer

[Jon Reid]

Thanks for your reply Eric. I've tried the cold variety of Potassium  
Oxalate (usually at around 20-22DegC) and normal KOx, at similar  
temps, and not seen a great deal of difference in image tone.
Is there something else I could try?

Does post-development toning in Gold Chloride yield similar colour  
change?

Jon


On 03/05/2010, at 1:10 PM, EJ Photo wrote:

> Jon, The color and the effects depend on a variety of situations  
> which is
> why you site all those in your question. The gold reacts very fast  
> with
> platinum, which is why Mike suggest not using it because he prefers  
> not to,
> not because it can't be done. It just will start to react when  
> added to the
> solution. Which can lead to streaks, and color that includes  
> violet. Is it
> wrong? just not a smooth print. Can it lead to less grainy prints?  
> it does
> smooth out the highlights but CAN add grain if you use it with .....
>
>
> Best thing to do is try it and find out how you like it. Buy a  
> stronger
> solution which can be diluted, very hard to make a strong solution  
> out of a
> weak one : )
>
> There are several ways to cool an image, if that is all you want to  
> do.
>
> Eric
>
> Eric Neilsen
> Eric Neilsen Photography
> 4101 Commerce Street, Suite 9
> Dallas, TX 75226
>
> www.ericneilsenphotography.com
> skype me with ejprinter
> www.ericneilsenphotography.com/forum1
> Let's Talk Photography
>
> -----Original Message-----
> From: alt-photo-process-list-bounces at lists.altphotolist.org
> [mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On  
> Behalf Of
> Jonathan Reid
> Sent: Sunday, May 02, 2010 7:39 AM
> To: The alternative photographic processes mailing list
> Subject: [alt-photo] Gold chloride in Pt/Pd sensitizer
>
> Hi all,
>
> I was hoping to get a consensus view on the addition of gold chloride
> in Ferric Oxalate. Dick Arentz claims that one drop 5% gold chloride
> added to the sensitizer will cool the image tone and possibly reduce
> granularity.
>
> I have read other reports that state one drop of 1%. Then there's a
> book called New dimensions in photo processes: a step-by-step manual
>   By Laura Blacklow, in which she states that "1-2% gold chloride, a
> few drops to warm the tones and reduce the contrast of a platinum
> print". I don't own this book but it showed up in Google Books after a
> search.
>
> Mike ware seems to discount the use of gold chloride in all but pure
> palladium prints. I can't check my Christopher James book right now as
> it is not with me.
>
> I searched the archives of the list but only really found references
> to post-development toning using gold chloride.
>
> I'm printing 5x7 pyro negs with 6 drops sensitiser and 7 drops metals.
> Bostick and Sullivan sell it in 0.2%, 1%, 5% and 10% strengths.
>
> Lastly, is the effect the same as gold toning post-development. If so
> I can see advantages ion not handling/wetting the paper twice.
>
> Sincerely,
>
> Jon
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