Silver
Use this equation to do dilutions of nic juice:
(Concentration 1) x (volume 1) = (Concentration 2) x (volume 2)
so:
concentration 2 = (concentration 1 x volume 1) / volume 2
in your case:
concentration 2 = (60 mg/mL x 120 mL) / 240 mL [volume 2 = 120 mL + 120 mL]
concentration 2 = 30 mg/mL
Also if you're looking for unflavored nic juice to add your own flavorings to; then I don't think there should be much difference in quality for unflavored juice.
I searched for concentrated nic juice yesterday; here are a few that I found:
Crystal Clear
vaping 30mL of 100mg unflavored juice in VG $19 [be extremely careful with juice at this concentration; wear nitrile gloves (can pick up at supermarket or Home Depot (paint section)) ]
MadVapes 60mL of 36mg in PG or VG $15
ecigexpress 30mL of 60mg PG, VG or PG/VG $16
Hope this helps and Mix Happy, Vape Long!!
