Page 1 of 2 12 LastLast
Results 1 to 10 of 11

Thread: Fixer F24 - help

  1. #1

    Join Date
    Nov 2009
    Location
    Asuncion - Paraguay
    Posts
    71

    Fixer F24 - help

    boys a help, I usually use Formula F24 fixative, only this time I get sodium metabisulfite, instead of sodium bisulfite. Can I use the same ratio of metabisulfite in formula F24?

  2. #2

    Join Date
    Oct 2015
    Posts
    741

    Re: Fixer F24 - help

    I do and never had an issue.

  3. #3

    Join Date
    Nov 2009
    Location
    Asuncion - Paraguay
    Posts
    71

    Re: Fixer F24 - help

    Quote Originally Posted by Alan9940 View Post
    I do and never had an issue.
    hello, thanks for your answer, saying that what is the formula you use? You can share. Thank you.

  4. #4

    Join Date
    Jun 2014
    Posts
    1,603

    Re: Fixer F24 - help

    Quote Originally Posted by Ricardo Maydana View Post
    this time I get sodium metabisulfite, instead of sodium bisulfite.
    Odds are you usually get metabisfulfite when you purchase bisulfite. You can replace bisulfite with metabisulfite in your formula by using roughly 0.9-0.95 as much metabisulfite as the amount of bisulfite called for. In water, metabisulfite instantly becomes bisulfite. For all intents and purposes, in a fixer formula, you can just use as much metabisulfite as the mount of bisulfite specified; the little amount of excess resultant bisulfite will not influence the fixer in any significant way.

  5. #5

    Join Date
    Nov 2009
    Location
    Asuncion - Paraguay
    Posts
    71

    Re: Fixer F24 - help

    Thank you very much for the clarification and just to not make a mistake, since English is not my mother tongue.

    if I did not understand, you can replace the bisulfite with the metabisulfite, at 0.90, below I write the formula I use and how it is if I use metabisulfite.

    If I use an amount of 30 g of bisulfite in my form, I must use 27 g of metabisulfite. is it like that?

    My formula.

    water 750 ml
    sodium thiosultate crystaline 240 gr
    sodium sulfite 20 gr
    sodium bisulfite 30 gr
    para preparar un litro de solución.

  6. #6

    Join Date
    Jun 2014
    Posts
    1,603

    Re: Fixer F24 - help

    Yes, that would work, and if you kept the metabislufite at 30g it woud still work fine as the amount is not critical in a formula like this.

    Out of curiosity: why use a sodium thiosulfate formula instead of a rapid fixer (ammonium thiosulfate)?

  7. #7

    Join Date
    Nov 2009
    Location
    Asuncion - Paraguay
    Posts
    71

    Re: Fixer F24 - help

    I use that formula for paper is the Kodak f24. I never question change, I get used to that formula.

  8. #8

    Join Date
    Oct 2015
    Posts
    741

    Re: Fixer F24 - help

    Hello Ricardo,

    The F-24 formula I use is slightly different from yours:

    Water 750ml
    Sodium Thiosulfate, penta 240g
    Sodium Sulfite 10g
    Sodium Bisulfite 25g
    Water to make 1L

    As I said above, I many times substitute Sodium Metabisulfite at 25g, though...technically...you would multiply by 0.91 bringing the total of metabisulfilte to approx 23g. I don't worry about it and use those chemicals interchangeably.

  9. #9

    Join Date
    Nov 2009
    Location
    Asuncion - Paraguay
    Posts
    71

    Re: Fixer F24 - help

    Thank you. if it is something different. I see you try according to your indications. following the line of Fixer f24. Is it the same formula for film?


    Enviado desde mi iPhone utilizando Tapatalk

  10. #10

    Join Date
    Oct 2015
    Posts
    741

    Re: Fixer F24 - help

    Quote Originally Posted by Ricardo Maydana View Post
    Thank you. if it is something different. I see you try according to your indications. following the line of Fixer f24. Is it the same formula for film?


    Enviado desde mi iPhone utilizando Tapatalk
    I looked it up in the The Darkroom Cookbook and the version I use is what's listed in that reference. You can substitute 22g of citric acid for the bisulfite, if odor is a problem for you. Yes, I use the same formula for both film and paper. If you intend to tone (selenium) your prints, then use this formula for the first bath, followed by plain hypo for the second bath.

Similar Threads

  1. TF 3 Fixer
    By Raffay in forum Darkroom: Film, Processing & Printing
    Replies: 17
    Last Post: 16-Apr-2013, 04:42
  2. Used Fixer?
    By MPrice in forum Darkroom: Film, Processing & Printing
    Replies: 7
    Last Post: 29-Jan-2009, 17:16
  3. C41 regular flexicolor fixer vs. RA fixer
    By Tom Westbrook in forum Darkroom: Film, Processing & Printing
    Replies: 1
    Last Post: 27-May-2006, 16:01
  4. "Rapid fixer" v.s. plain old "fixer"
    By Calamity Jane in forum Darkroom: Film, Processing & Printing
    Replies: 10
    Last Post: 4-Mar-2005, 06:11
  5. TF-4 Rapid Fixer, an alkaline fixer
    By William Marderness in forum Darkroom: Film, Processing & Printing
    Replies: 3
    Last Post: 11-Jan-2000, 22:10

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •