Cullet Quality Index

Sean Sabet

The multifunctional roles of cullet as an endless cradle to cradle sustainable material in today’s glass manufacturing have forced an increasingly need for use of cullet and this is even more pronounced in light of today’s energy prices. On the other hand, availability of high quality cullet has always been a challenge due to the contaminations during the recycling process of post consumer cullet. So far to the writer’s knowledge, there are no systematic methods to determine the type of contamination and also to express the severity of contamination in a pile of cullet or in a truckload of cullet shipment. This article is to establish a practical quality index to specify quality of cullet as far as type and severity of contaminants. This method of coding can be used by all parties in the life cycle of cullet i.e. cullet suppliers and glass manufacturing industries.