To the uninitiated, e-liquid is just “juice.” But to the experienced vaper, every bottle represents a specific balance of chemistry designed to deliver a precise experience. The two main components of any e-liquid base are Propylene Glycol (PG) and Vegetable Glycerin (VG). These two odourless, colourless liquids behave very differently when heated, and the ratio in which they are mixed dictates everything from the throat hit to the cloud density.
When you browse the shelves of a professional Vape Shop Sandy Springs, you will see ratios like 50/50, 70/30, or even Max VG printed on the bottles. Ignoring these numbers is a common mistake that leads to leaking tanks, burnt coils, or an unsatisfying puff. By understanding what each component does, you can select the ratio that perfectly matches your device and your personal preferences.
Propylene Glycol (PG): The Flavour Carrier
PG is a thin, watery liquid. It has a low viscosity, which means it is easily absorbed by the cotton wicking in your coil. Its primary job is to carry flavour. PG is excellent at binding to flavour volatiles, delivering a crisp, sharp taste profile. If you feel like your current vape is tasting muted, switching to a blend with higher PG might solve the issue.
The other distinct characteristic of PG is the “throat hit.” It provides that slight scratch or sensation at the back of the throat that mimics cigarette smoke. For ex-smokers, this sensation is often crucial for satisfaction. However, because it is thin, high-PG liquids (like 50/50 blends) are prone to leaking if used in large, sub-ohm tanks that have wide juice ports. They are best suited for smaller pod systems and starter kits.
Vegetable Glycerin (VG): The Cloud Creator
VG is a thick, syrupy liquid derived from vegetable oils. It has a naturally sweet taste, which can slightly alter the flavour of the juice, often adding a creamy undertone. The main purpose of VG is vapour production. It creates thick, dense, billowing clouds that linger in the air. If you see someone blowing massive plumes, they are undoubtedly using a High-VG liquid.
Because VG is so thick, it takes longer to soak into the cotton wick. If you use a high-VG liquid (like 80/20) in a small pod device with tiny wicking holes, the juice won’t flow fast enough to keep the coil wet. This leads to “dry hits”—that awful burnt taste. High-VG liquids are strictly for sub-ohm tanks and rebuildables that have large juice channels and high-wattage coils capable of vaporising the thick fluid.
Finding Your Perfect Ratio
The “Goldilocks” ratio for most modern sub-ohm tanks is 70/30 (70% VG, 30% PG). This offers a perfect balance: enough VG to produce satisfying clouds and a smooth inhale, but enough PG to carry the flavour clearly and keep the coil wicked efficiently. It is the industry standard for a reason.
For pod systems and nicotine salts, the standard is usually 50/50. These devices operate at low power and need the thinness of the 50% PG to function correctly. The higher PG also helps deliver the nicotine punch that pod users are looking for. If you have a sensitivity to PG (which causes throat irritation for some), you might need to seek out Max VG liquids, though you will need a powerful device to handle them.
Troubleshooting Based on Viscosity
Your liquid ratio can actually fix hardware problems. If your tank is leaking, try switching to a thicker liquid (higher VG). The added viscosity will prevent it from seeping past the O-rings. Conversely, if your coils are burning out within a day or you are getting dry hits, switch to a thinner liquid (lower VG) or one with more PG. This helps the juice penetrate the wick faster.
Understanding this fluid dynamics gives you control. You aren’t just buying a flavour; you are buying a formulation that ensures your device performs at its peak.
Conclusion
The ratio of PG to VG is the backbone of your vaping experience. Whether you prioritise stealth and flavour or massive clouds and smoothness, checking the bottle before you buy ensures you get exactly what you are looking for.
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Consult with our experts to find the ideal liquid ratio for your specific device and flavour palette.
