The dross box is is the interface and sluice between the tin bath and annealing lehr. Grenzebach's dross box is individually driven, height-adjustable and includes lift-out rollers that enable a flexible curve geometry, improved glass quality through a more homogeneous distribution of temperature across the entire width of the glass, and simpler maintenance and a local, decentralized control system. The Grenzebach dross box can master this tricky process step thanks to innovative technology. Valuable process improvements are achieved with customizable roller technology, special roller sealing and safe maintenance options.