When the discussion runs about the so-called 'light' cigarettes one presupposes that these are filtered cigarettes.

Filter is applied to protect smokers from the negative effect of smoking by decreasing the level of tar and nicotine inhaled by smoker whilst smoking. Perhaps it would be curious for cigarette consumers to find out some interesting facts about cigarette filter.

History.
For the first time cigarette filter was invented by a Hungarian scientist Boris Aivaz in 1925. Two years later smokers were given a possibility to try smoking cigarettes with filter. However there was not enough techniques to produce cigarettes with filter at that time. The idea was partially implemented. And only in 60-s cigarettes with filter received a wide distribution.

Observations.
When filtered cigarettes started to appear in stores their producers occupied with the experiments to bring to light their advantages in comparison with non-filtered cigarettes. The essence consisted in simultaneous comparison of both cigarette types by lighting them up. The received results showed that non-filtered cigarettes increased the amount of tar and nicotine.

Technology.
A cigarette filter is commonly placed at the end of the cigarette and represents a cork made of plastic material called cellulose. It is dissolved and after that divided into synthetic tows similar to cotton. Finally producers add the tow a plastic quality and cut it to insert into a cigarette. Filters may possess a large number of additives to fill a cigarette with rich taste shades as for example menthol cigarettes.

How it works.
As it was already noted filtered cigarettes possess special holes in them which allow the air to penetrate into the cigarette during the smoking process. It mixes with the smoke thus reducing the toxins. Filtered cigarettes are targeted at beginners due to the fact that the amount of smoke is less than in non-filtered cigarettes.