RE: Gum over Cyanotypes
Hi Don, thanks much for taking the trouble of sending a detailed description. 29 Nisan 2009, Çarşamba, 4:05 am tarihinde, Don Bryant yazmış: > ... > First I pre-shrink parent sized sheets 10 at a time in our garden sized > bath tube for several hours with luke warm water. > ... Will definitely try sizing sheets in warm water as you/David/Marek describes. I already prefer to acidify parent sheets too so shrinking will be done in the same regime. Actually it won't hurt my workflow since I already have to rinse the sheets to clear them of HCl and CaCl2, so that will be a warmer and slightly longer rinse... > I print cyanotype on the sized paper and never have a problem doing so. > Printing the cyanotype on the sized paper makes for a sharper image, IMO. That's interesting, my experience is the opposite. But I havent tried that w/ Fabriano Artistico. And I would agree that sized paper increase acutance due less reflections -> but eventually I size the papers later for gum printing, so it's only matter of timing... > I > register negatives by eye for gum exposures by laying the coated sheet on > a > light box with a sheet of glass lying on top of the negative. The negative > is taped in place once the registration is achieved and then exposed to > UV. > I never have any problem registering negs 11x14 or smaller. I always have registration problems in the first (and sometimes in the second too) gum layer. After that, no registration problems... From now on: 1. I will thoroughly shrink paper 2. I will expose the cyanotype with humidified paper (have to work out new exposure times -> they will be considerably shorter than my current ones) so that the paper relaxation is close to when I print gum (w/ humidified paper) 3. Will iron prints (as Christina said) after each layer I think that way the problem will be cured completely / forever... Regards, Loris.
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