[alt-photo] Re: dilution of pt/pd

[Paul Viapiano]

In the appendix of the Arentz book, Stan Klimek says that he extends the 
platinum solution by adding distilled water.

It's my understanding that he doesn't extend the solution if he's using less 
than 3ml of total solution (FO + pt). But starting at 3ml he extends by 
adding 1.5ml distilled H20, 8ml by adding 3.5ml, 12ml by adding 7.5 ml.

He states that this wetter solution makes for a smoother coat.

I believe he also states that his pt/pd ratio is 1:5.

Paul



----- Original Message ----- 
From: "Christina Anderson" <zphoto at montana.net>
To: "The alternative photographic processes mailing list" 
<alt-photo-process-list at lists.altphotolist.org>
Sent: Wednesday, July 21, 2010 2:06 PM
Subject: [alt-photo] dilution of pt/pd


> So,
>
> Paul V and Sam have diluted argyrotype to satisfaction apparently, even 
> great satisfaction.
>
> Sam and I have diluted cyanotype to satisfaction--smoother but slower 
> exposure is the downside.
>
> Has anyone aside from diluting 50% and double coating as Stuart Melvin did 
> for BFK, diluted pt/pd to satisfaction and if so to what amount? And if 
> so, to benefit of more absorbency, saving money, what?
>
> Chris
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