D-85 substitution with potassium bisulfite ?

Discussion in 'B&W: Film, Paper, Chemistry' started by jfdupuis, May 6, 2009.

  1. jfdupuis

    jfdupuis Member

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    Hi,

    The other day, I wanted to try to do some lith print. Therefore, I grab the D-85 formula and look at my chemical closet. I have everything in hand except the sodium bisulfite. However, I have plenty of potassium bisulfite. Can I use it as a substitution for the D-85 ?

    Thanks,

    Jeff
     
  2. drazak

    drazak Member

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    Jeff;

    Assuming that both salts are anhydrous you can use them in a ratio of 1.16g KHSO3 to 1g NaHSO3.

    Ben

    P.S. Thats the molar ratio, remember that from chemistry?