[alt-photo] Re: Question for Platinum/Palladium printers

[Diana Bloomfield]

Thanks for this information, Etienne.  I do use citric acid, but relative to what others have written here, I seem to use a lot more and soak/wash for longer periods of time.  It does seems to work well for Arches Platine, but I could never get Cot320 to clear completely with citric acid.  So-- thanks for the information in this and your follow-up post.

Diana

On Dec 30, 2011, at 7:06 PM, etienne garbaux wrote:

> Clay wrote:
> 
>> I agree. Disodium EDTA is the acidic version of EDTA. Tetrasodium is basic and and is just not a good idea all by itself.
> 
> I have not tested it, but I doubt the acidity of Disodium EDTA is sufficient to solubilize stubborn iron complexes.  I think you need a "mineral" acid (i.e., not organic) for that -- for example, acetic and citric acids are not enough (in my testing citric acid gave a valiant effort, and perhaps if you let prints soak for an hour it would work reliably, but I do not consider it trustworthy for this duty).
> 
> Best regards,
> 
> etienne
> 
> 
> 
> 
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