Quote Originally Posted by Ian Grant View Post
While not disagreeing remember that Kodak themselves don't actually specifical recommend using Distilled or Deionised water with Xtol in their Data-sheet. Traces of Iron will cause severe problems with fixers where the Iron and Thiosulphate form a fast acting bleach. I have had minute Iron particles in water way back in the 70's long before Xtol.

Good point.
Why Kodak doesn't suggest to use distilled water only?