RE: Salted paper

You got this formula from Keepers of Light? If so, it actually specifies 6
grams sodium citrate, not 12 grams. It also says that the gelatin starts to
decompose after several weeks, so that is another possibility. How long was
the interval between sensitising and printing? On some papers you will get
the start of "spontaneous darkening" within a few hours.

Your main problem is *probably* the extra citrate - you need a good excess
of silver over salt. The silver solution is probably OK if you made it with
pure (distilled or deionised) water - it keeps almost indefinitely; the
trouble is most likely due to the salting solution. If you want to try
again with the same solutions, give two coats of silver, the second after
the first is touch-dry. That will improve D-max and contrast.

Liam
-----Original Message-----
From: Juan Miguel Jusdado [mailto:jusdado@teleline.es]
Sent: 27 March 2005 08:52
To: alt-photo-process-l@sask.usask.ca
Subject: Salted paper

Hi all:
Today I have carried out two impressions of Salted Paper. The paper was
already prepared from the month of January with the following saline
solution:

280 cc. water
2 gr. gelatin
12 gr. sodium citrato
6 gr. chloride amonium

The solution of silver nitrate:

30 cc. water
4 gr. silver nitrate

it was also prepared from the month of January.

As a result, the two impressions don't hardly have contrast, the color is
yellowish lousy, etc. etc.

What can it have happened?.
Can it be had wornout the chemistry?
The chemistry of the salted one or the silver nitrate?.

Thank you.

Pardon for my English: text translated by computer.
Received on Sun Mar 27 08:43:25 2005