Quote Originally Posted by Relayer View Post
Yes, you right. If we omit DTPA or change it to other agent we need correct (decrease) amount of borax for required pH=8.5. This isn't a provlem
It's not only about pH, it's also about buffer strength! DTPA is a buffer at pH 8.5, if if we use less Borax in order to compensate for omission of DTPA, we create a much weaklier buffered developer.