Cyanotype Toning

[Andrew O'Neill]

 

[koraks]

Thanks for the demo! Did you find any ways to minimize/get rid of the stain? What you're showing in the video is also just about the best I ever managed.

Coincidentally, I was thinking last night about ways to convert the prussion blue in a cyanotype to black iron oxide. I know I've read something about this here on the forum, but I should really do a search for it. I was proofing some cyanotypes last night, which is why the thought occurred with me.

 

[Andrew O'Neill]

Thanks for the demo! Did you find any ways to minimize/get rid of the stain? What you're showing in the video is also just about the best I ever managed.

Coincidentally, I was thinking last night about ways to convert the prussion blue in a cyanotype to black iron oxide. I know I've read something about this here on the forum, but I should really do a search for it. I was proofing some cyanotypes last night, which is why the thought occurred with me.

I found the best way (so far) is to let the print float, face down in water for an hour, discard the water (it's a bit brown coloured), then repeat. If the water is clear, then I hang it up to dry.
In regards to converting Prussian blue, was it this thread?

 

[koraks]

Thanks; makes sense - I suppose this toning approach doesn't mesh well with my tendency towards impatience...I should do some more testing!

IDK about that thread and if my memory actually isn't playing tricks on me. I do recall the comments were more of a speculative nature than an actual tried-and-tested process. I'm not sure it's even possible...I should have another look at @fgorga's cyanotype toning threads.