The Roman writers Statius and Martial both indicate that recycling broken glass was an important part of the glass industry, and this seems to be supported by the fact that only rarely are glass fragments of any size recovered from domestic sites of this period.[1] In the western empire there is evidence that recycling of broken glass was frequent and extensive(cullet),[2][3] and that quantities of broken glassware were concentrated at local sites prior to melting back into raw glass.[13] Compositionally, repeated recycling is visible via elevated levels of those metals used as colourants.[18]