So, I found one where you just add water to dilute the 88% lactic acid. I read that one girl had no effect with 50% so I did a 50%...BIG mistake! My skin is way way way too sensitive for 50%. To top it off, I diluted and reapplied but I guess this is not the right thing to do because I now over exfoliated and my face is RAW!
Suggestion on the %% of lactic acid is start at 30% and maybe work up.
Formula is = 88/100 * % of formula will give you the % of lactic acid. You just adjust to get the % in the formula to get the desired % of lactic acid.
eg. 0.88 * 34 = 30% lactic acid.
Your formula would be 35% lactic acid and 65% water. Plug this into a formulator and you will get the measurements you need to make it. I mixed it in a small bottle and I measured by weight.