OB, I'm big on analogies so let me pitch this at you in a different way.
Let's say you want to make 10ml of juice that is 70%pg/30%vg with a nicotine strength of 20mg and your recipe calls for adding flavor at 10% of the total volume.
Don't think of juice, flavors, nicotine, etc.
Think of cookies!
Let's say you have a jar of snickerdoodles (VG), a jar of chocolate chip cookies (PG), a jar of chocolate chip cookies with nuts (100mg nicotine in PG) and some chocolate syrup (your flavoring that is also PG). And let's say that each cookie or flavoring = 1ml and your plate (a 10ml bottle) only has enough room for 10 of those items.
- Take 3 snickerdoodles (VG) and put them on your plate. (That's 3ml in a 10ml bottle or 30%. There's your 30%VG!)
- Take 4 chocolate chip cookies (PG) and put them on your plate. (That's 4ml in a 10ml bottle or 40%. We've now filled up 70% of your bottle!)
- Take 2 chocolate chip with nuts cookies (100mg nicotine in PG) and put them on your plate. (That's 2ml in a 10ml bottle or 20%. We've now filled up 90% of your bottle and that's also your 20% nicotine!***
***(This part needs more explanation. The more you dilute nicotine liquid, the lower the strength gets. For example, if you took 1 cup of 100MG PG nicotine liquid and mixed it in a bowl with 1 cup of pure PG, you'd end up with 2 cups of 50mg nicotine liquid. Instead, if you took your 1 cup of 100mg nicotine liquid and added 2 cups of pure PG, you'd get 3 cups of 33.3mg nicotine liquid. Adding 3 cups would yield 25mg and 4 cups - a 4 to 1 ratio - would yield 20mg. In our cookie example, we are putting 2ml of 100mg nicotine PG in a 10ml bottle and we're filling the rest of the bottle up with other stuff. That 2ml = 20% of the bottle so by the time we're done, that 100mg nicotine liquid we started with will be diluted down to 20mg since we are adding 8ml (80% of the bottle) of other stuff - the same 4 to 1 ratio.)
- Take your chocolate syrup (your flavoring) and squirt some on your cookies. (That's 1ml in a 10ml bottle or 10%. We've now filled up 100% of your bottle!)
- Presto, you're done! Out of your ingredients, 30% of them are VG, the remaining 70%, (including your nicotine, flavoring, and straight PG) are all PG-based so there's your 70PG/30VG mixture. Additionally, the nicotine was diluted down from 100mg to 20mg. You're ready to go.
Did that help or just totally make you want to eat a pile of cookies?
- Tim