Erosion (washout) / Sand scab
		It is highly probable that these two defects are caused by problems in the following areas: - Sand composition - Sand treatment/preparation - Pouring time The defects indicate that the following measured values probably deviate from the setpoint values: - Proportion of clay - Pouring time - Efficiency of the preparation The two defects indicate that the following manipulated variables should be changed: - Gating technique - Water content of the mould material - Mould material binder - Mould making - Core binder The following measures should be considered to remove the causes of the defect: - Slowly increase the proportion of bentonite - Mix more slowly - Make running and feeding system larger - Train team Defect description: - Washout - Sand scab