E-liquid is the liquid substance used in the atomizer of e-cigarettes that evaporates during the heating process and is inhaled by the e-cigarette user. Variety of flavours and nicotine concentrations provide an opportunity for vapers to choose an e-liquid that will perfectly match their taste preferences and satisfy nicotine cravings.
Vegetable Glycerin (Glycerol, VG). Natural compound derived from vegetable oils. Vegetable glycerin is commonly used in e-liquids as a thickening agent for the vapor. This compound has a sugary flavour and is much more viscous than Propylene Glycol (PG). VG based e-liquids have mild taste (they produce less throat-hit), their vapor is more dense and abundant in comparison with PG based e-liquids. Although, in comparison with PG, Vegetable Glycerin lacks flavour and nicotine transmission properties. Due to this fact, most of the PREMIUM LINE e-liquids are produced with a certain VG/PG ratio, in example 80%VG / 20%PG, 70%VG / 30%PG, etc. (Source: Vaping360. The Home of Vaping)
NOTE: due to high viscosity of VG based e-liquids they might be incompatible with some atomizers. It is strongly recommended to ensure that Your atomizer is compatible with VG based e-liquid use!
Industrial Use of Vegetable Glycerin
Food Industry: identifiable as E422, thickener and sweetener in food and beverages, helps to retain moisture and freshness in pastries (Source: COMPOUND INTEREST, 2014)
Pharmacy: sweetener in various drugs, one of the ingredients in production of pill shells - capsules (Source: COMPOUND INTEREST, 2014)
Cosmetics and Beauty Products: helps to retain moisture in products, commonly used as an ingredient in toothpaste, shaving foam, skin care products (Source: COMPOUND INTEREST, 2014)
Propylene Glycol (PG). Colourless and scentless substance of organic origin, less viscous than Vegetable Glycerin. Commonly used in e-liquids to produce the effect of throat irritation (also known as throat-hit), resembling traditional tobacco products. In comparison with VG, Propylene Glycol is a better flavour and nicotine transmitter and is commonly used as a carrier of these ingredients (Source: Vaping360. The Home of Vaping)
NOTE: due to low viscosity and highly pronounced throat-hit effect, PG based e-liquids are better compatible with mouth-to-lung type atomizers (resembling traditional cigarettes). It is strongly recommended to ensure that Your atomizer is compatible with PG based e-liquid use!
Industrial Use of Propylene Glycol
Cosmetics and Beauty Industry: ingredient in shower and bath soaps, shaving foams, facial cleansers, deodorants, perfumes, toothpastes, mouth rinses, body moisturizers, sun creams, shampoos, hair conditioners, hair gels (Source: PO/PG SECTOR GROUP OF CEFIC, BRUSSELS)
Pharmacy: ingredient in production of antiseptics, local anesthetics, vitamins and hormones, vaccines (Source: PO/PG SECTOR GROUP OF CEFIC, BRUSSELS)
Food Industry: carrier of taste and colour, solvent, thickener, stabilizing substance in food and beverages (Source: PO/PG SECTOR GROUP OF CEFIC, BRUSSELS)
Flavours (Aroma, Flavouring, Concentrate). Substances of natural and/or synthetic origin, used to add flavour to e-liquids. Flavours are usually PG based.
NOTE: flavours used in e-liquid manufacturing can be purchased separately, although vaping them pure (without mixing with e-liquid base) is STRICTLY FORBIDDEN! Vaping of pure (umixed with e-liquid base) flavours can seriously impact Your health!
Nicotine (Nicotine Concentrate). Substance of natural origin, derived from the leaves of tobacco. The amount of Nicotine Concentrate in the e-liquid compound determines it's strength, measured in milligrams in 1 millilitre (MG/ML). Nicotine Concentrate provides e-cigarette user with a similar sensation to smoking traditional tobacco products, although it's absorbtion is more complicated.
NOTE: NICOTINE IS A HIGHLY ADDICTIVE SUBSTANCE! Prior to purchasing e-liquid that contains nicotine, consider the type of Your atomizer: mouth-to-lung type atomizers transmit less nicotine than direct-lung type atomizers!
In order to choose e-liquid nicotine strenght that will suit Your needs and satisfy Your nicotine cravings, consider these aspects: the strength and amount of cigarettes You smoke (if You are a smoker) and the type of atomizer You are using (mouth-to-lung or direct-lung). The stronger (and larger the amount) of cigarettes You smoke, the higher nicotine concentration in e-liquid will be needed, although consider that direct-lung type atomizers produce more vapor than mouth-to-lung atomizers and much lower nicotine concetration will be needed to satisfy nicotine cravings. Preliminary recommendations for the choice of e-liquid nicotine strength: for users of mouth-to-lung type atomizers - 6-18 mg/ml (considering the strength and amount of cigarettes You smoke); for users of direct-lung type atomizers - 1,5-9 mg/ml (considering the strength and amount of cigarettes You smoke). If You are unsure about the choice of e-liquid nicotine strength, it is strongly recommended to choose lower concentration.
There are two main categories of e-liquids - CLASSIC LINE and PREMIUM LINE:
Classic Line E-Liquids: feature higher PG concentration, higher variety of nicotine concentrations, simple and traditional flavours in comparison with PREMIUM LINE e-liquids. CLASSIC LINE e-liquids have lower viscosity than PREMIUM LINE e-liquids.
Premium Line E-Liquids: feature higher VG concentration, lower variety of nicotine concentrations, exclusive flavours and are usually paired with droppers. PREMIUM LINE e-liquids have much higher viscosity than CLASSIC LINE e-liquids.