chrome plated plastic scrap is chopped into small pieces and then , while subjected to sub - zero temperatures , is centrifugally impacted thereby producing a mixture of particles of chrome and plastic . most of the chrome particles are removed by subjecting the mixture to a magnetic field . the remaining , mostly plastic particles are classified to obtain usable , predominantly plastic particles within a predetermined size range , those particles exceeding this range being , if desired , recycled for subjection to said centrifugal impacting step . the usable particles are thus reclaimed for reuse , after repelletizing , in extrusion or molding techniques .