Quote Originally Posted by Keith Tapscott. View Post
Gordon Hutchins chose metaborate for his PMK formula, so I guess he went against that advice.

The extra ingredients in packaged developers don't worry me, I was just curious to know more about them. Thanks Gerald.
"... the ability of borate ions to form stable molecular complexes with compounds containing hydroxyl groups on adjacent carbon atoms. Thus catechol and pyrogallol or certain of their derivatives should not be used in developers based on borates." Mason, p 34. The developing capability of catechol is almost completely eliminated and that of pyrogallol seriously reduced. Of course this does not apply to the metol in the PMK fgformula.