EtOH = ethanol (or perfumer’s alcohol)
DPG = dipropylene glycol (or “oil”)
It looks like to me that Dancing Joker has given us algebraic tautologies which evade the question more than they answer it.
Obviously, if you put something close to 100% DPG into a TOGO bottle it is not going to spray. I haven’t tried it, but these atomizers seem to be designed for regular liquids, not oils. OTOH if you have something like EST diluted in close to 100% alcohol it is going to dissipate rather quickly when you’d like for the effects to stick around for a while.
I have made an alcohol based mix which seems to be quite effective for only twenty minutes to half an hour. I suspect that FututureKill’s EST is similarly short lived. Many of APR’s alcohol based consumer products last three or four hours. So… without diluting the alcohol based mix any more than necessary and without gumming up the atomizer with excessive DPG, what is a reasonable amount of DPG to be added to an alcohol mix to slow down the dissipation rate?
What percentage DPG will work well in a TOGO bottle? One percent? Five percent? Ten percent? Twenty five percent? Fifty percent? I don’t have a clue, but for someone who has made these kind of mixes, it has got to be pretty easy to give a ballpark answer here.
I have not been able to find much by searching the forum. MarkL suggests adding one drop of DPG per five ml of alcohol based mix.
On another post he elaborates on going the opposite way, diluting an oil solution with ethanol
I have another concern. Does anybody remember the word miscible from chemistry class? If you add a ml of alcohol to a ml of DPG does that give you 2 ml? Not a trick question. Not a stupid question. If you add one ml of water and one ml of alcohol, the resulting volume is less than two ml. That is because alcohol is miscible in water. The molecules of alcohol and water kinda fit in between each other so they share the same space and take up less volume together than as separate liquids. Does anyone know if the same thing happens with ethanol and DPG?
Another thing I found: According to Jasmin there are 36 drops of DPG (TAA oil) per ml, 540 drops per (15ml) bottle. There are 40 sprays per 5ml TOGO bottle. That means sprays are much larger than drops.