From: Derby Telegraph
He said: “Many people do not realised that legally sold cigarettes extinguish quickly if they are not inhaled. It is called the ignition propensity test and during the manufacture, something is added so that a third of a cigarette will go out when not inhaled.
“Illicit cigarettes manufactured aboard do not have this and will burn until the end so, for example, if someone smoking a cigarette falls asleep and drops one there is a far higher likelihood of a fire being caused with these illegal ones.
“Of course, all smoking is harmful but we are also finding that counterfeit cigarettes have six or seven times the amount of lead and cadmium in them than legally produced ones.”