Q I’ve always known veining to be problem that is addressed by mold coatings and additives. Yet, even using these products the problem never seems to go away completely. Please explain to me what “veining” is, what new method — if any — are available to eliminate this defect.
A Veining is caused by the non-linear expansion of silica sand during the casting process, which forms veins or “fins” on the casting surface, resulting in positive metal. There are several options in order to overcome veining, ...Read Full Answer