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Thread: Gevaert 504

  1. #1
    piticu's Avatar
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    Gevaert 504

    Does anybody has a different formula for this reducer?

    Mine is from “Gevaert manual of photography”, fifth ed rev, 1962 and it says:

    Ammonium persulphate 20grams
    Sulphuric acid conc. 10drops
    Water to make 1liter

    Any help will be much appreciated.
    Collecting and sharing analog black and white formulas. http://bwformula.atelierelealbe.eu

  2. #2
    Ian Grant's Avatar
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    That's the correct fomula for the Gevaert Persuphate bleach, it's the same in earlier editions. Can't check the 1st 1938 that must be on my shelf in Turkey.

    Ian

  3. #3
    piticu's Avatar
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    Thanks a lot Ian. It will be correct to say that 10drops equal 2.5 mililiters?
    Last edited by piticu; 10-11-2011 at 11:36 AM. Click to view previous post history.
    Collecting and sharing analog black and white formulas. http://bwformula.atelierelealbe.eu

  4. #4
    Ian Grant's Avatar
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    I've found I do have the 1st edition here taht gives volumes in UK avoirdupois, I'll try and convert accurately later when I have more time. There is a conversion for drops to actual volume, but it's best left as drops.

    Ian

  5. #5
    piticu's Avatar
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    Quote Originally Posted by Ian Grant View Post
    I've found I do have the 1st edition here taht gives volumes in UK avoirdupois, I'll try and convert accurately later when I have more time.
    Many thanks again Ian. Looking forward
    Collecting and sharing analog black and white formulas. http://bwformula.atelierelealbe.eu



 

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