Use priti^®clean cleaning powder when you clean the furnace to ensure lasting results: Simply add the powder to the combustion chamber and run a standard sintering process to bind any residual impurities in the powder. It is particularly important to clean sintering furnaces that are contaminated by dye liquids before sintering a pre-shaded material for the first time. This prevents unpleasant surprises and allows optimum photo-optical results for the zirconium dioxide.