Abstract: A method for treating nicotine containing materials such as tobacco, tobacco smoke and tobacco extracts involves adding to an adsorptional filter material postassium aluminum sulfate, KAl (SO.sub.4).sub.2, commonly known as alum, in a quantity of 10 to 200 mg per cigarette, which additive is capable of chemical binding of nicotine and other toxic materials in the tobacco smoke.

Abstract: A full head respirator to filter the air of smoke and fumes, that includes an infrastructure capable of fitting over a human head and adaptable to all sizes and shapes of wearers. The infrastructure is formed by a plurality of intersecting air tubes. The respirator has a covering made of flexible flame-resistant material that is adapted to envelop the human head and neck, mounted on the infrastructure and secured thereto. The covering has a transparent eyepiece, and filter means. The respirator has a mechanism for generating a foam to fill the air tubes of the infrastructure, and thereby fit them about the head of a wearer, and fastening mechanisms to secure the respirator on the head of the wearer.