Quote Originally Posted by konakoa View Post
Thanks for that link Dominik.

Searching the threads here on APUG with "EDTA" in them, I ran across this amazing posting from Marco:

http://www.apug.org/forums/forum228/...nts-paper.html

Please see what he says under "Employ the best clearing and washing techniques" and "Important corrections..." a few postings below that with followups by Mike Ware.

So, if I was to use EDTA with Van Dyke Brown, do I want it to be acidic or alkaline? I've read elsewhere that if the processing solutions go alkaline, that locks the iron salts in the paper. Keeping the processing solutions acidic lets them wash out. Yet Mike Ware in Marco's post above says to keep it alkaline.

Anyone have any thoughts?
Mike Ware is probably one of the greatest experts on photographic chemistry in the world and I would be guided by this.