Quote Originally Posted by PDH View Post
I have not much luck getting information from Edwal on Edwal 20, I have seen a few posts in the past for FG7, but most thought that the formula provided was not correct, much the same for Edwal 20. Hope someone has the correct formula.

Edwal published Edwal 20 so it's correct, the was a Super 20 which wasn't published.

FG7 has never been published but uses NaCl formed by uses HCl and NaOH in the developer so in some ways is similar to Microdol/Perceptol.