Re: Blue-Black Cyanotype & Luster

On Tue, 4 Oct 2005, davidhatton wrote:

> Hi Mark,
>
> According to Post Factory issue #5 page 41 by J.S.
>
> To black-tone a blue print (it says in the book):
> Soak print in solution containing a copper salt.
> Wash. Immerse in ammonium sulphide. Or, copper
> solution can be added to the sensitizer. (if it works,
> send an e-mail)
>

This one I did try, because I had the copper salt, but I think I may have
had only sodium sulfide, which as I recall is stink bomb grade. In any
event, I didn't give it a LOT of effort -- in part because it was
my understanding that copper wouldn't be archival.

J.
Received on Tue Oct 4 21:32:43 2005