Re: Removing Cyanotype Solution from a Stouffer Wedge

From: Ryuji Suzuki ^lt;[email protected]>
Date: 02/22/05-07:35:01 PM Z
Message-id: <>

Why Sistan? If you could decompose hexacyanoferrate to free
ferric/ferrous ions (ferrous ions will eventually be oxidized by air
to be ferric), thiocyanate would make soluble, but blood-colored
complex. But it seems to me that acid/chelate mix like glycolic acid
and EDTA would do. If you have CLR Rust Remover, try that, because
it's supposed to be a blend of glycolic acid, citric acid and sulfamic
acid, with lots of surfactant. If you have some EDTA, throw that in too..

BUT - I would make small strips of fixed out 35mm film base, dried,
similarly contaminated with cyanotype sensitizer and test treatments
on them first. Do it soon - if Prussian blue is formed in/on your step
tablet, that may be it and only your credit card could solve the

Ryuji Suzuki
"Well, believing is all right, just don't let the wrong people know
what it's all about." (Bob Dylan, Need a Woman, 1982)
Received on Tue Feb 22 19:35:11 2005

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