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At that the filter did not make cigarettes 100% safe, but for the smoking public was enough to know that such a device makes the smoke at least a little more useful)) Plus, the manufacturers themselves got into the game, as the filter ate a part of the length of cigarettes, reducing the most expensive part tobacco

Updated May 23, 2025

93 Smoke was routed to a mixing compartment and distributed between two exposure chambers, each containing 4 cages with the materials

However, the nicotine concentration at the end of the ad lib use period was significantly higher following use of the tobacco cigarette compared to the e-cigarettes, with concentrations ranging from 23 % to 53 % lower after 60 min of ad lib use