I read that article also, and ran it through ChatGPT. I'm having it generate a PDF now and will post it later.
There used to be a member on here that talked a lot about emulsion varnish but he hasn't posted in a long time, maybe passed? people come and go.
I'm not interested in trying an emulsion varnish for now but I would like to try a leaner varnish as a ground so the 2:1 is a mix I'll test on some scrap wood.