Tonwaren-Industrie Wiesloch (TIW AG, originally Thonwaaren-Industrie Wiesloch GmbH, abbreviated Ton) was a brickworks making which existed in Wiesloch, Germany between 1895 and 1989. It was one of the largest and most significant factories in Germany.The factory was located just north of Wiesloch-Walldorf station and was the largest employer in Wiesloch. Raw clay material was excavated from a clay pit in the Dämmelwald forest on the north-west side of Wiesloch. This clay material was located at an elevation of 120 metres above sea level within the Upper Rhine Graben.