Hi guys, nice meeting you here! I always faced casting blister issue in zinc casting. Sometimes I don't see the blister on the casting surface but when it went through plating process, the blister will surface out. This makes me wonder are those blisters from casting process or from plating process? But sometimes I do see blisters surfacing on the casting surface, so I am suspecting that after plating the blisters that appears on the surface is caused during casting process??? How to prevent blister during casting process? This defect is a high fallout in the production. I really need your professional advices. Thank you!