E-cig coils are one of the most important components in an e-cigarette. Coils are responsible for heating up the e-liquid in your e-cig and turning it into vapour.
In strict terms, a vape coil is the wire wrapped in a spiral shape around your e-cig wicking material. Then it’s fitted in place in its e-cig atomizer head, the coil connecting the positive part of your battery to the negative. When you use your e-cig, the wick is usually saturated in e-liquid, the battery is turned on and heats up the coil, and the coil vaporises the e-liquid in the wick into vapour. The vapour then travels up trough your clearomizer or tank chimney, and you have vapour to inhale – just like that.
The wire for coils is made from a few different conductive, heat resisting materials, most commonly stainless steel.
Experienced vapers who use mod kits for sub ohm vaping will sometimes make their own coil setups. They purchase special alloy wires and their preferred wick material and then spend time tightly winding the coil wire, manually fitting it into their e-cig kit, and then feeding the wicking material through the middle of the coil. Most vapers, however, will purchase ready made replacement coils.
Do I need a license to sell Vaping products in the UK?
As stipulated in the Tobacco Products Directive, e-liquids with nicotine can only be sold in 10ml bottles in the UK. However, there’s no restriction with e-liquids that don’t have nicotine. An example of these would be shortfills, which are nicotine-free flavour concentrates that are available for as much as 50 to 100ml per bottle. You can then add a nicotine shot to these.
In the UK, e-liquids are also only allowed to have a maximum nicotine strength of 20 mg/ml. The manufacturer should ensure these come with nicotine warning labels.