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

[Clay Harmon Website]

I just use the tetrasodium variety out of habit. I wonder if using the disodium variety would beneficial? I know it is acidic versus the slightly basic tetrasodium version. hmmmm


Clay
On Jul 24, 2010, at 6:35 AM, Loris Medici wrote:

> Clay which EDTA is that? I presume Na2EDTA... Right?
> 
> 2010/7/24 Clay Harmon Website <clayh at clayharmon.com>:
>> Mark, adding oxalic acid to the FO will shorten the exposure time. I tested this years ago, and it is increases the light sensitivity of
>> the coating solution. And slightly increases its exposure scale. And makes it easier to clear. No downside to adding it that I was
>> ever able to detect. My formula is 27g FO, 4g oxalic acid, 2g EDTA to make 100ml. I think this is a pretty standard mix.
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