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  1. #11
    gainer's Avatar
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    I should have pointed out that HC-110 contains an organic sulfite complex. It is a PQ developer. Without some sulfite, the superadditivity between the P and the Q does not work. The synergism between P and C does not require sulfite to make it work, so XTOL would be an active developer without sulfite. Sulfite has other effects and may be required even in a PC developer to satisfy grain-sniffers.
    Gadget Gainer

  2. #12
    Murray Kelly's Avatar
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    Jan 2007
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    Well, there you go. After following multiple threads on APUG I missed that point.
    I was unaware that P & Q were superadditive. Back to the drawing boards.

    Murray

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