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Old 13th December 2019, 07:57 PM
Michael Michael is offline
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Join Date: Dec 2008
Location: Ballinderry Lower, Co. Antrim
Posts: 1,345
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Ted, forgive me if you've already done this; but I had a look through Christopher James's chapter on the process and he says nothing at all about how soon after coating the paper should be exposed. That would suggest that he doesn't consider it an issue.

Van Dyke isn't a process I have tried: my cyanotype coated paper can be kept for a bit but it has the useful feature of discolouring after a while!
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