I'm not a chemist.....but I had quite a bit of chemistry in college, a full year of inorganic, followed by a year of organic, concurrent with a year of biochem.
3 to 1. That's the ratio I'm sticking with. Why? Because that is the concentration that will oxidize the cell wall of mold and bacteria. Look it up.
As far as Cervantes, I don't remember what he recommended, but if it was indeed less than 3 to 1 nothing is happening. If you want to kill mold use 3 to 1. If you want to whiten your teeth, use 1 to 1. If you want to burn yourself, go stronger.
The reason I didn't directly answer the question is because it was posed in a confrontational way. No one said, "Hey Doc, why do you recommend 3 to 1?" No, they said "Cervantes says something different than you. Why would Cervantes recommend so much less than you?"
Well, that's total bullshit passive/agressive crap! First of all, I can't comment about what Cervantes might be thinking. I've only met the man twice. Secondly I don't appreciate being set up "against" Cervantes by an anonymous schlub on a pot forum who has no experience using the method. Lastly, I wasn't asked directly why I chose 3 to 1.....no, I was asked to justify my method as compared to someone elses AND opine on that person's thought process.....and all of this to satisfy a stranger I've never met or spoken to who first communication with me is a challenge.
3 to 1. It's common knowledge. Look it up people.