Bull. Spec. CORESTA Congress, Manila, 1980, p. 111, T03, ISSN.0525-6240
The SPA Filter
Société Job, Perpignan France
The SPA filter is a new model of cigarette filter made from a fibrous sheet, cut in ribbons, and which is geometrically conformed as a rod. The structure of the fibrous sheet is made up of two different fibrous threads interspersed with each other :...