Jaime Prat, ASK Chemicals España, S.A. Dr. Reinhard Stötzel, ASK Chemicals, Hilden Ismail Yilmaz, ASK Chemicals, Hilden Copyright – 2012 World Foundry Congress ABSTRACT Sand additives are widely used within the foundry industry to control veining defects on cored surfaces. They are most often used in conjunction with refractory coatings which improve surface finish and control metal penetration, thus…