Blog
The simplistic (though not very satisfying) answer is … chemistry. While e-juice is really just a mixture of liquids (food grade flavorings and glycerin plus a little nicotine), that little bit of nicotine is actually fairly important. (I may be wrong, but isn’t it one of the reason for vaping?)
It is well known that nicotine, all by itself, is sensitive to heat, light (mostly the UV in sunlight) and oxygen in the air. Nicotine freshly distilled from some tobacco is almost colorless at 99.9% purity. However, put a clear glass bottle of it on a shelf by a window and it will turn straw yellow within a few days.
The thickness or thinness of a liquid blend (i.e., “viscosity” in geek-speak) depends on the chemical components in the blend, their relative amounts, and their compatibilities (think of oil and water). We pre-dissolve some flavoring components to make them more compatible with VG. These flavor solutions can then be easily mixed (in very small amounts) with VG and appropriate amount of liquid nicotine to produce a desired eLiquid blend.
VapinUSA is a company that specializes in providing alternatives to smoking tobacco. If you're a smoker looking to quit, you may want to consider switching to vaping. Vaping is an excellent alternative to smoking and has helped many people kick the habit. At VapinUSA, we offer a wide range of products, including disposables, pod mods, and starter kits, that can help smokers transition away from traditional tobacco products.