Why Green Sand Chemistry Changes Overnight

You ran the lab test at the end of yesterday’s last shift. Active Clay: 8.2%. LOI: 3.8%. GCS: 1,450 g/cm². Moisture: 3.4%. Everything looked right. This morning, first sample off the muller: Active Clay: 7.6%. LOI: 4.1%. GCS: 1,280 g/cm². Nobody touched anything. Same sand. Same system. Same recipe. But the numbers moved.

Read the full article to learn about green sand chemistry, overnight sand changes, bentonite thermal degradation, sand system prediction, foundry sand management, active clay loss, green sand foundry.