Using Lavaquick

Discussion in 'B&W: Film, Paper, Chemistry' started by digiconvert, Dec 20, 2007.

  1. digiconvert

    digiconvert Member

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    I,m using washaid (lavaquick) for the first time and despite giving a very good rinse after use I get a brown deposit/haze on the print after drying (kentmere FB paper) which becomes really unsightly if I then try to selenium tone.

    Any ideas as to the cause ?

    Cheers CJB
     
  2. dancqu

    dancqu Member

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    A very good rinse? Is that all? How about a
    very good wash? Dan
     
  3. Dave Miller

    Dave Miller Member

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    Can't help since I've never used it. I assume you are using it after the use of a acid fix in order to reduce you washing time. If that is the case I suggest you consider using an alkline fixer since this is reputed not to need long wash times to remove it.
     
  4. digiconvert

    digiconvert Member

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    You say potato I say Potatoe :smile:

    10' under a running tap .
     
  5. dancqu

    dancqu Member

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    Some will say stain but I say fog. You'll have to back
    up on your procedures to isolate the problem. What's
    in that HCA and who's turning it out. Never heard of
    it. A little sodium sulfite or sodium carbonate are
    easy Home-Brew solutions.

    Ten minutes is a very short wash and that for very
    well processed prints. Dan
     
  6. JBrunner

    JBrunner Moderator Staff Member Moderator

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    I would suggest running a print without the washaid to isolate it as the culprit, and continue from there.
     
  7. loman

    loman Subscriber

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    I've used lavaquick almost exclusively for the past two years.
    Never ever had a problem with it.
    It's great stuff.
    By the way it's made by Tetenal.
    Best Regards
    Mads Hartmann
     
  8. Tom Hoskinson

    Tom Hoskinson Member

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    The problem could easily be with your wash water or with your fixing and washing procedure (as others suggest later in this thread).

    The Lavaquick MSDS lists the Lavaquick main ingredients as:

    Potassium Sulfite
    Potassium Carbonate
    (EDTA) Ethylene Diamine tetraacetic acid, tetra sodium salt (a chelating - water conditioning agent)

    In other words, Lavaquick is a garden variety wash aid. It should not stain your prints unless it (or your water) is contaminated with a staining agent.

    Try fixing your prints in 2 baths of fresh fixer followed by washing in several complete water changes - forget the Lavaquick.

    If your prints are still stained or fogged - check the paper for fogging and your developer for contamination.
     
  9. digiconvert

    digiconvert Member

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    Thanks for the suggestions. I was surprised that this wash aid was so little known but it's a European product and may have no distributor on t'other side of Atlantic.

    Any hows. I have been tried variations on my process and with different wash cycles I have got a decentish print of an FB paper much quicker than my previous process (longer and longer soaks in fresh water worked for me) . Still not happy with Se tones but that's something else to work on. What I like about this hobby is trying new stuff, I'll probably not use a wash aid once this bottle's gone but I've tried it :smile:

    Cheers CJB
     
  10. dancqu

    dancqu Member

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    Potassium takes it out of a lot of gardens. It MAY
    be the problem. Although B. Troop has overstated
    the miss-match twixt potassium and fixer another
    authority on the subject warns of the mis-match.
    Although not spelled out, some and likely most
    salts of the silver thiosulfate complex are
    little to entirely insoluble.

    To reduce the interaction twixt the fix and hca
    the print should receive a thorough rinse prior
    to the hca bath.

    BTW, that is the reason I recommend a distilled
    water rinse for film immediately following the
    fixer. By so doing suspect tap water will
    not be forming precipitates within
    the emulsion. Dan