A major reason that the propylene glycol is added to e-liquid is the visible and sufficient steam production. The steam production is important for two reasons. First, although the e-liquid vehicle and second, vapors appreciate a large amount of vapour that most visually resembles cigarette smoke.
So to ensure adequate vapor cloud, propylene glycol (PG) or vegetable glycerine (VG), two virtually odorless and colorless liquid, is added to the mixture.
Note that the PG is not the same formulation as ethylene glycol a similar product used to make car radiator fluid or antifreeze. In fact, it is widely used all over the world every day.
Propylene glycol is the main ingredient in most commercial food dyes. It is used in cosmetics, toiletries, food colors, dressings, soft drinks and more.
Although Propylene glycol is one of the main ingredients in e-liquid there are so many different types available on the market, take a read of Vapors Digest article on the types of e-liquids to get a better understanding of how this works. They look at the e-liquid and break it down into simplistic data so you can fully understand the elements of e-liquid and ultimately help you understand the product so you can choose the right type for you personally.
Image thanks to VaporsDigest.com
What are the disadvantages after to use from propylene glycol in the eliquid?
Like any product, the PG has undesirable effects:
· Sometimes, people using an electronic cigarette for the first time complain of a dry throat.
· Propylene glycol is a humectants (attracts moisture) that can dry the throat.
· Sore throat disappear in a day or two, although drinking water can help too.
What are the signs a allergy the propylene glycol ?
As any product, there are allergies concerning the use of propylene glycol. If symptoms persist, however, it may be that you are allergic to propylene glycol. Some people do not even realize they have an allergy to PG until they use an electronic cigarette with a PG-based eliquid for the first time. Allergy symptoms may include night sweats, rash, diarrhea and a dry throat and irritants.
If you have any of these symptoms, we recommend that you consult your doctor and switch to a vegetable glycerin-based liquid (GV).
Allergic to PG? So try VG a go !
If you are allergic or sensitive to propylene glycol another alternative exists: the eliquides made with vegetable based glycerin.
Vegetable glycerin, commonly called glycerine is a clear liquid, viscous, almost odorless, which is slightly thicker and softer than propylene glycol.
The food grade vegetable glycerin is used in all kinds of food coloring is used in more than 1,500 applications, many of them as additives for food and beverages.
Also used in cosmetics.
Propylene glycol or vegetable glycerin?
Your choice will depend on your preferences for overall flavor and spray properties. PG reputation produce better flavor. If you prefer a more intense vapor cloud, choose VG. You could even combine the two. For example, some vapors e-liquid start with a base liquid propylene glycol and then they dilute slightly this e-liquid with vegetable glycerin. This gives them the maximum flavor and improves the amount of steam produced.