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Thread: RA-4 Problems

  1. #11

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    I am using a 10% acid stop bath. I ended up using 22-23c for around 20s and the contrast and saturation are perfect. At 18-20c I cant achieve saturation at all, maybe I need more time.
    Should a lower temperature with longer times tame the base fog better?
    "The Medium is the Message"

  2. #12
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    All I can say is that Agfa paper may respond differently than Kodak paper. Also, this paper is quite old which contributes to the problem.

    Good luck. I have no further suggestions for you.

    PE

  3. #13

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    Thanks PE, and happy holidays!
    "The Medium is the Message"

  4. #14

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    Quote Originally Posted by afrank View Post
    I am using a 10% acid stop bath.
    It may not make any difference to what you have described as your problem but isn't 10% acid bath way too high? I simply dilute commercial acid stop to the same dilution as I use for B&W paper as per the stop bath's instructions and I had always thought this gives an acid percentage of 1-2 %

    pentaxuser

  5. #15
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    Good point. The acid should be 1 - 2%.

    Happy Holidays.

    PE

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