While I'm here... I think I've found some images that want to be Cyanotype,
so have been working with it lately. It seems to react to paper quite
strongly. The papers that have given me longer scales (and better shadow
separation) haven't cleared well in the highlights (Cranes Parchment Wove,
Arches hot press, contrast longer than silver but shorter than platinum).
The papers that cleared well didn't give me as long a scale and a very
sharp shadow cut off (Cranes Platinotype, contrast about equal to silver).
I just purchased some Bristol plate finish to try. Any other thoughts?
tomf2468@pipeline.com
>Hello again,
>
>Here is my Ferric Ammonium Citrate puzzle:
<BIG SNIP>
>The following week several students from the afternoon class revealed that
>their cyanotypes printed during the week had not "come out." After some
>head-scratching we realized all failures were from lot #2. The powder
>looked fine, like ordinary green scales, but mixed into distilled water, I
>now discovered, it immediately turned a dark brownish blue-green -- not
>the usual light green. (This was just the fe am cit in distilled water,
>before adding potassium ferricyanide.) The bad prints were very pale and
>foggy, even after half-hour exposures (usual is 6-9 minutes).
<BIG SNIP>
>Judy