RE: Salted paper

Liam, thank you to answer.
  
I use 12 gr. of sodium citrato in my formula of salted because it provides a
beautiful reddish brown tone.
  
The paper was salted in the month of January, he/she covered with silver
nitrate and it was exposed to light UV this same morning. Several hours have
passed, the paper has dried off completely, but the color has not changed.
  
The solution of silver nitrate was made with distilled water.
  
I have consulted my notes and be possibly what you say, in other occasions,
he/she always gave two layers of silver nitrate, but this time I only gave a
single layer.
  
I will try to repeat the impressions basing me on my old notes.
  
Thank you again.

-----Mensaje original-----
De: Liam Lawless [mailto:liam.lawless@blueyonder.co.uk]
Enviado el: domingo, 27 de marzo de 2005 16:43
Para: alt-photo-process-l@sask.usask.ca
Asunto: 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 13:02:40 2005