Measuring The Redox State Of Cullet

Many of the final properties of a glass product, such as colour or the presence of cords, are determined, in part by the redox state of the batch or cullet used to make it. Redox state will also affect the fining and foaming behaviour of the molten glass in the furnace. This article examines and compares the methods available for assessing redox state of batch and cullet.