[alt-photo] Re: Van Dyk sediment

[Harry Lock]

Thanks for the info.

I have had it for about a year, and I do see some mirroring on the bottle.

Harry
  ----- Original Message ----- 
  From: Loris Medici 
  To: 'The alternative photographic processes mailing list' 
  Sent: Friday, August 06, 2010 8:20 AM
  Subject: [alt-photo] Re: Van Dyk sediment


  1. Yes.
  2. Filter it out.
  3. The black stuff is - probably - elementary silver; in later stages,
  you'll also see mirroring in the internal sides of the bottle...

  No adverse effect, but the loss of silver will eventually affect your images
  (less silver = weaker image, in terms of density...), you'll know it then,
  and you'll mix fresh sensitizer.

  Hope this helps,
  Loris.

  P.S. How old is the sensitizer? BTW...


  -----Original Message-----
  From: alt-photo-process-list-bounces at lists.altphotolist.org On Behalf Of
  Harry Lock
  Sent: Friday, August 06, 2010 8:37 AM
  To: The alternative photographic processes mailing list
  Subject: [alt-photo] Van Dyk sediment

  Hi All

  Some time ago I bought a bottle (brown) of mixed solution for van Dyk
  prints. I used it and all was fine. Now I see there is a black sediment in
  the bottle. I have tried using the solution by pouring very carefully, as
  not to mix in the black sediment, and the prints look good.

  My questions are:

  1. Should I continue using the solution?
  2. Should I try to mix-in the sediment, or put the lot through a coffee
  filter?
  3. If the solution is 'working', as it is in my test, is the black stuff
  necessary, - or in this case - lack of it, effect the long term life of my
  prints?

  Any and all help will be gladly accepted.

  Harry

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