> Some people say (it was noted in The Film Developing Cookbook) that, > since D76 and ID-11 are essentially the same formula, developing times > using these developers should be identical. However, Ilford publishes > figures showing different times for these developers, and my times work > out best with ID-11 about 10% less than with D-76, which ends up being > different from Ilford times in many instances.
The classic formulas are the same. However, the packaged products from both companies depart from the published formula. Neither company is telling exactly how. It's believed that Ilford adds chelating agents and anti-foaming agents, and Kodak substitutes sodium metabisulfite for some of the sodium sufite, as a preservative and to keep the pH constant. These may not be the only differences. --Mike - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
