Food grade off the shelf essence type flavourings like moirs that you find in the shops often contain oils some brands contain alcohol not a good idea to vape.....
Some people back in the day actually added alcohol to increase throat hit on a juice. It is tiny amounts, 2 drops per 10ml was the recommendation. Most swearing by pure grain alcohol.
Nic does impart its own flavour and can change subtle flavoring in a juice. I normally leave complex suble high vg juice be and drip those in the evenings. Adding nic to those usually mutes the flavour a bit, I found anyway, some juice is not prone to this but the majority are. The lower nic...
Guys don't forget PG also adds to throat hit. Nic is one part of it. For instance Scream is high vg so even with the extra nic it might not give you that satisfying hit you expecting.
I normally mix all my juice at 50/50
I did the progression from 18 to 6 but holy moly I was vaping 20-30ml a day at one stage. Sanity prevailed and I went back to 12 and drip 6mg in the evening. My wallet has thanked me.
The chemical make up is exactly the same whether it is derived from plant, animal or synthesised. If it is pharmaceutically rated BP (British pharma standard) or USP (US rating ) it has a certain purity. Where it differs is what is in the impurities, that 0.5%. I know there is one type we should...
You have to pulse the coils to get them heating up from the middle out. If you still have hot legs pulse the coils till glowing and run your mandrel through them it sorts it out. Once they glow evenly from the middle out you good to go, wick and vape.