Please forgive me but I feel compelled to mention that my vanity license plate reads "CYANTST". I've been meaning to take a picture of that and my lab area to share with the list. If you look at the explanation under the illustration on page 151 in the second addition of Christopher James' Book of Alternative Photography it will make more sense.
On Sat, Dec 13, 2008 at 11:24 PM, Alberto Novo
<alt.list@albertonovo.it> wrote:
Maybe an unrelated question--is it **possible** that the bleeding in pt/pd could similarly be caused by an excess of iron?
So I second that this would apply also to other iron processes, substituting the "color-forming iron" whith whatever reacts with the photochemically formed iron(II). The calculation have to be made with moles and not grams. Note that am fe citrate is the only poorly defined substance (a 14.5-16% Fe).
Alberto