Propylene Glycol (PG)
Propylene glycol is the blood of the e liquid mixture and carries flavours from the e-juice to the mouth.
The aqueous nature of PG is the reason it is used in the manufacture of e liquids since it is able to soak wicks more easily. That, plus it is pharmaceutical grade therefore safe for human consumption.
PG is also easy to work with as flavourings are easily dissolvable in it. Just like VG, it is an alcohol, almost odourless and has a sweet tinge to it, although not much as to be used as a sweetener.
The higher the PG ratio in the juice, the less smooth the e-juice is to vape. This is the reason some vapers have issues with it, accusing it of being harsh or irritating and so tend to prefer low or even PG-free vape juice.
On the flipside, PG also gives more throat hit or ‘kick’. It carries flavour better and allows vapour to have ‘weight’. So, the higher the propylene glycol levels in your juice, the more ‘punch’ it will have.
PG-based e liquid is more fluid, and so works better in tanks with small wick holes to avoid leakage, as well as clearomisers and older atomisers.
However, it produces less vapour, making it ideal for people who want to vape discreetly but unpopular with cloud-chasers.
PG is water-soluble and non-toxic and used as an additive in pharma, food and cosmetics to keep them moist.
Vegetable Glycerine (VG)
Vegetable glycerine is a key component of our e liquids.
If PG is the blood of the mix, VG is the glue that holds it all together.
Glycerine is a natural substance and the type used in e liquid manufacture is extracted from vegetable oils such as coconut oil, soy or hydrolysing palm, hence the reason it is called VG.
There are different grades, but as a vaper, the one you should be interested in is the USP/EP Food Grade.
Just because VG is made from oils doesn’t mean it is an oil. Actually, it is an alcohol, just like PG, so it is safe to inhale.
It is very thick and viscous, and for this reason, high-VG e liquid doesn’t work well in small clearomisers and older atomisers because it is too thick to wick properly.
Modern devices are built for this, this is why most are capable of producing huge white plumes, unlike the little wisps of thin vapour that were common in older models.
The higher the VG in e liquid, the more clouds will be emitted. But VG falls short on the throat hit aspect.
Vegetable glycerine is odourless, colourless and bears a sweet taste which is why you’ll find it being used in as a sweetener in the food and medical industry.
The best VG is one that contains low water content.
50VG 50PG: Smack in the Middle
A 50VG/50PG e liquid seeks to bring out the best of both worlds by eliminating the shortcomings of each. The result is an even mix that strikes a harmonious balance between throat hit and cloud production.
This makes this blend a perfect starting point for vapers because it delivers a decent plume without noticeably interfering with flavour.
The 50PG 50VG e liquid UK works great in refillable starter kits and vape pens, and is best used with coils that have a resistance of 1 ohm and above.
Sub ohm coils (those with a resistance of less than 1 ohm) work best with thicker e liquids, so the 50VG 50PG may not be ideal due to its fluid nature.
50VG/50PG juices are also commonly used in disposable e cigs such as the Aquavape Nano Disposable.
This non-refillable pod utilises a nicotine salt formula which delivers a strong nicotine rush minus the irritating harshness.
The Aquavape 50PG 50VG e Liquid UK Range
Here at Aquavape, we have a wide range of vape flavours in the 50VG/50PG category.