Folks, thanks as before for your well informed posts.
I have now drafted a summary of the technological development of the e-cig over the past decade and the parallel regulatory dance. My feeling is this is very bare bones at the moment; I would like include more technological distinctions between first and second gen. then I have at the moment (inc. voltage, wattage etc), personal experiences of use of various devices, and potentially the US as well as the EU regulatory situation. Suggestions gratefully received. In particular I need to give a few examples of first gen products, currently marketed x, and y: Also if there is anything incorrect here, esp. on technical issues, please do let me know:
First generation e-cigarettes mirrored conventional cigarettes in form and shape, hence the common alternate name of the ‘cig-a-like.’ These devices used sealed reservoirs of nicotine solution that could be not be refilled, their batteries could usually not be recharged. They were, in effect, single use products. Examples in the UK included x and y. The adherence to c-cigarette dimensions imposed major constraint on the size of the battery with consequent impacts on performance. Many smokers found – and indeed still find – cigalikes fundamentally unsatisfying products.
A second-generation device – again, broadly speaking – is distinguished by its reusable nature, a battery that can be recharged, and reservoir that can be refilled with liquid. At the Vapeshop Hungarian manager xx (name redacted), emitting huge clouds of Watermelon mint vapour as he spoke, pointed to the Joyetech 510 on sale here for £30, and the cCom-C Twist at £45 as examples of these devices. The option to use third party e-liquid led to a proliferation of flavour and juice; while these devices tended to be more expensive than cig-a-likes as upfront purchases their ‘open system’ nature and third party liquid makes them cheaper to use long term.
Third generation products are more elaborate still, often distinguished by wicks and atomisers that can be rebuilt when worn out (or coated, as is wont to happen, in carbonised vegetable glycol), and options to adjust the voltage and wattage. Many of these devices bear no physical resemblance to cigarettes whatsoever; instead they look like starter pistols, or microphones, or even, in the case of the Innokin iTaste 134, a Gatling gun. Many users say second and third generation devices provide a more satisfying vaping experience, and are more effective at helping them to wean themselves off conventional cigarettes. That finding is supported by a paper published in the scientific journal Nature last year, which showed new generation devices produced blood nicotine levels 35-72% higher than first generation devices, though delivery was still slower than with conventional cigarettes.
If that surmises the technological shift then the parallel regulatory dance is complicated too. Again, e-cigarettes left field entrance is germane, as unexpected arrivals, for some time regulators just did not know what to do with them. In Europe it initially looked like medicines regulation was the most likely path. However, the EU’s second tobacco products directive, which was approved in February 2014 and will come into effect in May 2016, will instead provide two routes to certification, first as a tobacco product, and secondly as medical device. The tobacco products will be limited to a maximum eliquid strength of 20mg/millitre, an amount many vapors believe to be too low for effective smoking cessation, and will be forbidden from some forms of advertising, notably television. Taking the medical device route will require a costly and complex regulatory approval process, which is likely to be out of the reach of the many independent players who have pioneered the market thus far.