Hi: Nitric acid is kind of nasty. I've used tannic acid to tone cyanotypes
On Thu, 24 Oct 2002, dennis vinciguerra wrote: > Hello all, > Certain cyanotype images work very well in blue, some in brown but then > there are those that need to be black. The formula I have calls for nitric > acid but I'm not having any luck locating it. Anyone have either a source > or another black toning formula ? > > Thank you, > Dennis > > _______________________________________________ > 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 ---------------------------------------------------------
