Mr. Hart: Suggest that it might be a heck of a lot easier to control developer pH, and thus speed will remain constant. There are many folks on the market that supply pH controlled feed and bleed apparatus to keep pH in developer constant. Developer solution is so cheap that that this change pays for itself in improved yields. Rudy Sedlak RD Chemical Company The mail list is run by SmartList v3.05 To unsubscribe from this list at any time, send a message to: [log in to unmask] with subject:unsubscribe and no text.