RE: Van Dyke

I normally get some sludge that I just ignore. I think the key is vigourous
mixing and slow addition of solution C.

Richard Retzlaff
Radical Eye Photography Ltd.
(306) 652 8894 Saskatoon, SK
rick@radicaleye.ca www.radicaleye.ca
  -----Original Message-----
  From: R E Redman [mailto:Redman@elmet15.freeserve.co.uk]
  Sent: Tuesday, April 12, 2005 2:27 PM
  To: alt-photo-process-l@sask.usask.ca
  Subject: Re: Van Dyke

  Hello Loris

  Thanks for the suggestion. I'll try that tomorrow.

  Bob
    ----- Original Message -----
    From: Loris Medici
    To: alt-photo-process-l@sask.usask.ca
    Sent: Tuesday, April 12, 2005 8:20 PM
    Subject: RE: Van Dyke

    Hi Bob

    Same for me. Just filter the solution (using coffee filter) and use
that. I haven't encountered any problem doing this. My double coated
Vandykes are very nice.

    BTW, I didn't controlled your formula. I assume your formula is right.

    Regards,

    Loris.

----------------------------------------------------------------------------

    From: redman 2000 [mailto:redman@elmet15.freeserve.co.uk]
    Sent: 12 Nisan 2005 Salı 22:07
    To: alt-photo-process-l@sask.usask.ca
    Subject: Van Dyke

    I have just resubscribed to this list after an absence of three years.
Similarly, Ihave restarted my interest in alt photo processes. I would like
to seek advice on a problem I have mixing Van-Dyke sensitiser. Three years
or so ago I successfully mixed a batch of Van Dyke sensitiser. It is still
usable but is almost used up. I tried, three times, to mix another batch but
on each occasion I end up with a bottle 3/4 full of sludge. The formula I
use is : solution A = 10grams ferric ammonium citrate (green) + 35ml of
deionised water; solutionB = 1.5grams tartaric acid + 35 ml deionised water;
solutionC = 4grams silver nitrate + 35 ml deionised water. When all
chemicals are dissolved I add B to A, stirring and then very slowly ( a drop
at a time) add C stirring continuously.

    Can any one advise me what I am doing wrong and is there any way I can
reclaim the 'sludge'

    Thanks

    Bob Redman, UK
Received on Wed Apr 13 09:12:39 2005