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Polimero - ezio martuscelli

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IT IS USEFUL TO DIVIDE THE PLASTIC ITEMS OF ARTISTIC<br />

OR HISTORICAL INTEREST ACCORDING TO THE NATURE OF<br />

THE POLYMER COMPONENT. SO WE MAY HAVE OBJECTS<br />

MADE BY :<br />

--- NATURAL PLASTICS ( AS EBONITE, SHELLAC, CASEIN )<br />

--- MAN-MADE PLASTICS ( ARTIFICIAL PLASTICS:<br />

AS CELLULOID, CELLULOSE ACETATES )<br />

--- MAN-MADE PLASTICS ( SYNTHETIC PLASTICS:<br />

AS BAKELITE, PVC, PMMA ECC. )

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