Re: Gum over Cyanotypes
Thanks Jacek :) You're right, if I size before cyanotype, probably the paper would change dimensions much less (but then I will have problems with later / darker gum layers, since with every gum layer paper shrinks more - due gum shrinking in the darker=thicker parts... One way or another you hit that wall!) therefore first gum layers will register better. That occured to me too, but the problem is that I can't get a nice cyanotype on sized paper (to gum requirements); bleeding is much more, tones are muddy (compared to plain paper) and sharpness is less. To me, cyanotype has to be *in* the paper, not on the surface... Regards, Loris. 28 Nisan 2009, Salı, 11:06 am tarihinde, Jacek Gonsalves yazmış: > Stunning work as usual Loris! :) > Question why do you size after cyanotype? Is it because the cyanotype > bleeds after? > Can you size, then cyanotype, then size again? or does this defeat the > purpose, as it will shrink/warp the paper even more? > cheers > Jacek > > Quoting Loris Medici <mail@loris.medici.name>: > >> I did few gum over cyanotypes recently and I happen to like them much. >> See >> the most recent one below here: http://dwarfurl.com/008fa >> >> The print is on HCl acidified (2 minutes in 2.5%) Fabriano Artistico EW. >> One -1/3 stop exposed cyanotype layer + 3 gum layers. (1. PR206 5% AD >> +1/3 >> stop exposure, 2. PV19 Rose + PBk9 5% AD normal exposure, 3. PBk9 2% AD >> +1/3 stop exposure.) >> >> I print the Cyanotype on unsized paper, then size with 3% gelatin. After >> sizing, the paper change dimensions and you can't register the negative >> perfectly on the first gum pass - 2mm larger in both horizontal and >> vertical orientations (print size 10x6.6"), the registration gets >> perfect >> only in the second or third gum pass. (See the resulting blur at the >> right >> edge in the middle.) >> >> My question is: How do you manage to get perfect registration for gum >> over >> layers? >> >> Any tips and tricks would be highly appreciated. >> >> Regards, >> Loris. >> >> P.S. I have read Lukas Werth's method somewhere else: Affix the paper on >> dimensionally stable support - such as an aluminum sheet - with gelatin, >> print, varnish the print (acrylic binder + mineral spirit) to "protect" >> the gum layer and then put the print in warm water (this is where you >> need >> "protection"!) to melt the gelatin and release the print from the >> support. >> I would like to hear about any suitable varnish that can be used for >> this >> purpose too...
|