[alt-photo] Re: potassium phosphate

[Loris Medici]

Not in my subjective eyeballing experience (I must confess that I haven't
checked that with a color densitometer) - at least when exposing relatively
humid paper. (Which I almost always did; I was usually waiting not more than
8-10 minutes after coating, and I was always using a 2 mils thick protective
transparent sheet between the paper and the negative...)

I agree that adding gold chloride for neutral blacks isn't necessary... As I
said before, I was only using very little of it, in order to get subtle
blue-brown splits with relatively (to the above) dry paper.

Regards,
Loris.


-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org On Behalf Of
Marek Matusz
Sent: Tuesday, June 29, 2010 4:09 PM
To: alt photo
Subject: [alt-photo] Re: potassium phosphate


Loris,

Palladium POP might look "black" when you look at it, but not quite black
when you put it next to a pure platinum print. AT least that was my
experiece.

Marek
 
> From: mail at loris.medici.name
> To: alt-photo-process-list at lists.altphotolist.org
> Date: Tue, 29 Jun 2010 16:05:16 +0300
> Subject: [alt-photo] Re: potassium phosphate
> 
> Marek, I don't understand that; you can already get rich and dead 
> neutral blacks with (NH4)2[PdCl4] or Li2PdCl4, "w/o adding any Pt 
> and/or gold chloride"?
> 
> Regards,
> Loris.
> 
> 
> -----Original Message-----
> From: alt-photo-process-list-bounces at lists.altphotolist.org On Behalf 
> Of Marek Matusz
> Sent: Tuesday, June 29, 2010 4:00 PM
> To: alt photo
> Subject: [alt-photo] Re: potassium phosphate
> 
> 
> By the time I could get really nice and neutral black with POP 
> palladium and gold, I was also getting a pink stain in the highlights,
very unappealing.
> The pink is a result of colloidal gold being made during development. 
> The more gold, the reacher the blacks and worse pink stain, the 
> contrast of the mix changes as well. AT the end I did not feel I could 
> produce images that were techincally accomplished and do it in a 
> reliable fashion
> 
> If you are after pure rich black pure platinum is the way to go.
> 
> Marek
> 
> > From: mail at loris.medici.name
> > To: alt-photo-process-list at lists.altphotolist.org
> > Date: Tue, 29 Jun 2010 09:22:49 +0300
> > Subject: [alt-photo] Re: potassium phosphate
> > 
> > I was getting subtle blue-brown splits with pop palladium (AFO + 
> > LiPd), by replacing up to 10-15% of Pd with KAuCl4...
> > 
> > Regards,
> > Loris.
> 
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