Response to Is ID-11 the original D-76 or the buffered one?

Quotes from Riichard Knoppow over on USENET:
Both D-76 and ID-11 are metol-hydroquinone developers containing no Phenidone. Check the MSDS for them at http://hazard.com Kodak has newer MSDS for its products on its web site: http://www.kodak.com Ilford does make a Phenidone-based developer similar to D-76 under the name Microphen. Microphen is buffered in the same way that packaged D-76 is. The published formula for ID-11 and D-76 are identical. The packaged versions of neither is exactly like the published formulas. The packaged version of D-76 is similar, but not identical to the buffered D-76 published as D-76d. The buffering was done to eliminate a characteristic increase in pH and thus activity of the unbuffered version. The buffered version was announced in a paper published in 1929 so its been around for a while. The packaged version is made of somewhat different forms of the chemicals, e.g. boric anhydride instead of boric acid, which are probably for greater stability of the powedered form and to allow mixing from a single powder formula. ID-11 contains a sequestering agent, probably to make it go into solution more easily and to avoid precipitating calcium in the water its mixed with. I would appear from the MSDS that ID-11 is also buffered although the buffering system is different than D-76. ID-11 also contains cinnamic acid, which is also in some other Ilford developers. I don't know what this does.

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