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Pink stains on BW prints

dancqu

Member
Allowing Ads
Joined
Sep 7, 2002
Messages
3,649
Location
Willamette V
Format
Medium Format
Hi, Initially, these were not visible, but gradually became
visible during the washing cycle. Marco

Same here. OK through the developer and fix then
some hue ensues; my testing with less than adequate
fix. No pink or close though. I've studio proofs from the
40s with still visible image which are very red-ish.
No fix at all likely.

A slight under fixing leaves a trace of silver evenly
distributed with in the emulsion. On short exposure to
light it is soon reduced to metallic; might be thought of
as a POP with highlight density through out.

Now about that ferrOcyanide. I don't agree. It's silver
salt is not very stable. In a nut shell, that ferrO form will
convert to ANY of the halides; usually the bromide when
sepia toning. IIRC it was Mr. Rudman who pointed out
that ANY of the halides or a mix can be used with
or after the use of ferricyanide.

Every salt of silver is soluble with the use of thiosulfate;
the iodide and sulfide being two of the very least soluble
salts. A silver image converted to silver ferrOcyanide
maintains it's integrity because of it's insolubility in
solutions lacking solvent action. Dan