I'll check my notes again Joe.
In the mean time, I found that I have added Thymol at 60C, but I've used IPA. I use IPA because Everclear is illegal in NYS.
The nearest source is NJ.
Joe, I checked the class notes and you are correct. I spoke OTOMH and was wrong. Sorry.
I also found that my personal notes show a wide range of temperatures and amounts of 10% Thymol. So, I am stumped. I've added much more ethanol than 1 drop / 20 ml and gotten good results in other cases. Are you sure it was not glyoxal or that you did not have hardener present at the time?