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  1. #11
    davido's Avatar
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    a chelation agent which is very useful if you're doing iron based alternative processes such as Pt/Pd, Kallitype, Vandyke, Agryrotype, New Chrysotype. It's commonly used as the primary "acidic" clearing bath (at 2-5% strenght). Na4 EDTA is/may be used later as secondary alkaline clearing bath (often mixing it with 2-5% Sodium Sulfite). You need an acidic first clearing bath with iron processes.
    Loris, do you use EDTA in place of Citric Acid for initial clearing baths with VDB and Kallitypes? Is there a noticable difference on how they both clear or in the resulting prints?

    thanks
    david

  2. #12

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    I personally use EDTA only with New Chrysotypes and/or Ziatypes. Never used it with Kallitype and/or Vandyke (only citric acid and plain sodium sulfite) - not because I think it's bad; I just haven't bothered... I believe it's a good practice to use Na4EDTA + Sodium Sulfite as the last clearing bath / before final wash - especially for prints you're going to sell or give someone as gift.

    Regards,
    Loris.

    Quote Originally Posted by davido View Post
    Loris, do you use EDTA in place of Citric Acid for initial clearing baths with VDB and Kallitypes? Is there a noticable difference on how they both clear or in the resulting prints?

    thanks
    david

  3. #13
    George Papantoniou's Avatar
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    Quote Originally Posted by Loris Medici View Post
    Kalimera Yorgos,

    See:
    Bereket Kimya, http://www.bereketkimya.com/iletisim.html
    (The picture on top, it's very close to Galata Bridge)
    For buying chemical compounds in Istanbul. Right next to Bereket Kimya there's another store for chemicals: Balmumcu Kimya.

    Yassou,
    Loris.

    P.S. Do not mix it all in once, mix fresh before each session.
    Now, that's one (more) good reason for me to travel to Istanbul...

  4. #14

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    Quote Originally Posted by George Papantoniou View Post
    Now, that's one (more) good reason for me to travel to Istanbul...
    Another landmark for you - in order to let you find the place more easily: the big L shape building (labeled: Misir Carsisi) on lower left corner is the "Spice Bazaar".

    Regards,
    Loris.

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