Published 03/14/2025 at 812 × 610 in Development of water-based core technology for light alloys Figure 38. Effect of dilute nitric acid (1:1, 1:2 and1:5) on Trial 1B fired at 200 °C after one hour Figure 38. Effect of dilute nitric acid (1:1, 1:2 and1:5) on Trial 1B fired at 200 °C after one hour