Yes. Changing the ascorbic acid will change pH. Yet I just re-examined my negatives developed with 3.5g and 2.8g of AA. Their densities are practically identical. But 3.5 vs 2.8 would be a 25% measurement-error. With the virtually the same results. That's robustness.
Originally Posted by Ryuji
Here are the pH's I measured:
3.5 g of AA: pH 8.21Notice that XTOL is well above 8.20. I thought my meter was reading high, but I did a two-point calibration, and it passes the Borax-test. Methinks that Kodak boosted the pH a little after filing the patent.
2.8 g of AA: pH 8.33
Ryuji, when testing DS-10, you noticed that some 100-speed films develop poorly below pH 8.2. I suspect that Kodak observed the same thing late in the game, and boosted pH to give themselves more pH-headroom. Either that or my meter's defective.