Chuck,(posted 9126 days ago)Periodically, Kodak will "re-test" certain emulsions for various manufacturing and product characteristics. With a black and white film, this may mean a series of processing tests to reevaluate current processing recommendations. The previous recommendation of 8.5 minutes in D-76 was one that had stood for some time and still may appear on some data sheets or literature. About 3 years ago Kodak tested the processing characteristics of HIE and arrived at the new recommendation of 11 minutes in the same developer at 68 degrees. I myself haven't found that my processing times have shifted that much and I have used D-76 and HIE as a combo for years. It is however a good point to remind us to run exposure and process tests from time to time. I hope this has been helpful to you.
Michael D. D'Avignon