Hey man hopefully this will help, but this is the recipe i go by according to Baker Street, who is a member of this site and is a pharmacist. 1/2 cup of baking soda, mixed with 5 cups of warm to hot water. ( i add two tblspoons of sea salt, but you dont have to) you soak that on your hair, massage it into the scalp( close your eyes tight cuz that shit burns) the wrap your hair in a towell for 20 minutes. Rinse out with warm water thoroughly then do your ACV wash. Which is 1 tablespoon of acv to 4 cups of water. Pour on hair ( dont wrap in towell) and let sit for 2-5 minutes. The longer you wait, the silkier your hair will get, you'll find what the right time for you is. I know its not a science, but this is as close to it as it gets.
P,S, i also add 6 drops of teatree oil, 6 drops of jojoba oil, and 8 drops of jasmine flower for scent.