We get asked all the time for instructions on how much flavoring to use. Well, the simple answer is: There is no simple answer
We try and list our recommended dilution for our highly concentrated flavors, however, taste is so subjective. There's really no single answer for each person. For vapers who are still smoking, you may require more flavoring to satisfy the palate. For others, some flavors are just simply too strong.
For Flavour Art tobacco flavors, you really want to start with 1% dilution. That is such a small amount of flavoring. You almost have to mix up a 5ml batch in order to flavor your liquid using these tobacco flavors, or you have to dilute the flavor yourself with PG or some other dilution base. Just to give you a general idea of how strong these flavors are - It only takes 1-2 drops of the Flavour Art tobacco flavoring to flavor 5ml worth of unflavored liquid. Of course, this is to my taste, you may be different!
For LorAnn Super Strength flavoring, it also depends on the flavor itself. I've found the Cheesecake and Marshmallow to be fairly mild, so you will likely want in the 15-20% range. Others like Cherry, which is very strong, you may only want 5-10%. They are all different.
For Professional Flavors line, you will get a nice flavor for your liquid with 10%. These too are different, some may require less, some more.
You can experiment with your flavors without wasting your e-liquid. You can mix up a small batch in a 3ml bottle. Just drop 10-20 drops of PG into the bottle, and add your flavoring, according to the suggested %. If the flavor is too weak, add a second drop. If it's too strong, add in some dilution base liquid. Once you have a flavor strength that you are happy with, you can mix up a batch with your e-liquid, and you're set!
My best advice is to work in small batches. Always use the same size dropper to dispense your flavoring and dilution base liquid. This will give you a more accurate measurement to base your ratios on.
Example: I have a 6ml bottle of Black Cherry Professional Flavor, and I want to mix up 30 drops of flavored liquid. Since I know the % of flavoring that I want is 10%, I will use 27 drops of e-liquid, and 3 drops of Black Cherry.
Example: I want to mix up 30ml of Black Cherry flavored liquid using 10% flavoring. I will measure out 3ml of Black Cherry flavoring and 27ml of e-liquid.
It's all about trial and error, and finding what tastes best to you!