Re: Cyanotype woes
Keith said: but I with red and yellow gum layers I
was getting some of the deepest blacks I've ever seen in any process.
PS this, above, along with sharpness of the layer, is the best reason to use a cyano underlayer--the resulting black in the print which eliminates the necessity to print a K layer as some suggest must happen. However, this also is the reason that some don't like the cyano underlayer--it is too dark. Hence I actually have switched from a 2:1 A:B ratio that I always used to use to a 1:1, so that I have essentially halved my FAC proportion to what it once was.
1) use a more
concentrated solution of FAC
YES 2) dump vinegar in the gum development
Try this--it'll tell you if alkalinity is the issue 3) finish the project in 6 years when the Cyanotype solutions
Now a question for you and others: I have never aged my cyano--I'm too impatient, so I just mix n' go. I do this with VDB also, tho they say age it. Do you have data on this--is it a good thing?have properly aged.