When a cyanotype is made it looks gorgeous when wet. As it dries it looks lighter. After the cyanotyoe is dry the pigment (prussian blue) oxidizes and gradually turns darker.
hydrogen peroxide oxidized the pigment immediately. Its not the drying process that makes it go darker - its the gradual oxidation of the pigment. H2O2 will get the print as dark as it will ever be. Gord On Wed, 23 Oct 2002 neuhausph...@aol.com wrote: > Not really...the intense blue achieved with the H2O2 bath just quick forces > the dark blue that will naturally occur with normal drying...kind of like a > preview. > > Mike > > > In a message dated 10/21/02 12:30:49 PM, glsm...@yahoo.com writes: > > << My understanding is that the blue will reduce in intensity after drying. > Is > this not true? > > Cheers - > > george >> > > > _______________________________________________ > Post to the list as PLAIN TEXT only - no HTML > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??????? > unsubscribe or change your account at > http://www.???????/discussion/ > --------------------------------------------------------- Gordon J. Holtslander Dept. of Biology hol...@duke.usask.ca 112 Science Place http://duke.usask.ca/~holtsg University of Saskatchewan Tel (306) 966-4433 Saskatoon, Saskatchewan Fax (306) 966-4461 Canada S7N 5E2 ---------------------------------------------------------
