You can get Nitric Acid from Rembrandt Graphic Arts. Here is the uel: http://www.rembrandtgraphicarts.com/07_rga_cat.html#Anchor-MORDANTS-49575 Hope this helps Rusty
> 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 >
