I have been reading 8% so that would be 1.2ml of a 15ml bottle. But I am still experimenting, hopefully someone else will chime in.
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Burnie
Really depends. The 24 mg unflavored WTA can be added to regular liquids in any amount from just a drop per bottle all the way up to just using it straight as is (that's what I do). It's wonderful stuff straight, but you'll have to be able to handle it at full strength to pull it off. Some of us can, others can't.
If you have a regular eliquid you want to add WTA to, you can test out various WTA percentages fairly easily.
10% WTA: add 1 mL of 24 mg WTA to 9 mL of regular liquid. Effective nicotine plus alkaloid concentration in mg/mL will be (adding the WTA to a 12 mg/mL regular eliquid as an example):
[(1 mL * 24 mg) + (9 mL * 12 mg)] / 10 mL
[(24 mg) + (108 mg)] / 10 mL
[(132 mg)] / 10 mL
13.2 mg/mL
25% WTA: add 1 mL of 24 mg WTA to 3 mL of regular liquid. Effective nicotine plus alkaloid concentration in mg/mL will be (adding the WTA to a 12 mg/mL regular eliquid as an example):
[(1 mL * 24 mg) + (3 mL * 12 mg)] / 4 mL
[(24 mg) + (36 mg)] / 4 mL
[(60 mg)] / 4 mL
15 mg/mL
Math, it's only fun if you're good at it.
