[alt-photo] Re: NICKEL (NOT COPPER)-GREEN CYANO TONER

[Alberto Novo]

BOB, 

I did not write before, because I am ever late in these things. 

I believe that the original formula is in M. Ware "Cyanotype: The History, 
Science and Art of Photographic Printing in Prussian Blue".
It is not really green, but a shift towards greenish-blue. Just soak the 
print in a 5-10% solution of Ni(II) salt (i.e. NiSO4) for about one hour. 

Alberto
www.grupponamias.com
www.alternativephotography.com/wp/photographers/rodolfo-namias-group