[pure-silver] Re: Yellow stains on prints
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Mon, 24 Oct 2005 16:00:01 -0700
----- Original Message -----
From: "Ibrahim Pamuk Genel Müdür Yardimcisi - Vestel Savunma
Sanayi A.S" <ibrahim.pamuk@xxxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Monday, October 24, 2005 8:15 AM
Subject: [pure-silver] Yellow stains on prints
I have got yellow stains on my B&W prints which have been
hanged sometime on the wall. I believe that its due to
improper handling of the print. Is there a remedy for these?
Will bleach and redevelop or toning help?
Regards,
Ibrahim Pamuk
These are likely due to incomplete fixing or washing. About
the only remedy is to try bleaching and redeveloping the
prints. It might not work. The following formula is
published by Kodak for removing developer and oxidation
stains on negatives but it may work here.
Kodak Bleach
Stock Solution A
Potassium Permanganate 5.2 grams
Water to make 1.0 liter
Make sure all particles of the Permanganate have dissolved
and filter the solution before use.
Stock Solution B
Cold water 500.0 ml
Sodium Chloride (table salt) 75.0 grams
Sulfuric acid, concentrated 16.0 ml
Cold water to make 1.0 liter
Use equal parts of A and B. The mixed solution does not keep
long and should be mixed just before use.
Bleaching for negatives takes 3 or 4 minutes at 68F, prints
will bleach faster.
Remove the Permanganate stain by treating in a 1.5% solution
of Sodium bisulfite. Probably working strength Kodak Hypo
Clearing Agent will work.
Rinse well and redevelop in Dektol or other print developer.
Wash after redeveloping.
If this doesn't work the only solution is to make new
prints.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
=============================================================================================================
To unsubscribe from this list, go to www.freelists.org and logon to your
account (the same e-mail address and password you set-up when you subscribed,)
and unsubscribe from there.
Other related posts:
