is a thermoplastic resin composed of plasticized and stabilized cellulose acetate; this means that it can be repeatedly softened and reformed under the action of heat and pressure, and it reinforces every time it is cooled. The raw material for the eyewear industry is supplied in the form of sheets obtained from a block or by extrusion
is a resin lens compatible with all framematerials which, thanks to its properties, can be used when screws and holes through the lens are necessary.