According to official website's inquiry about copper tools, the reason why copper is transformed into water and poured into the die is that the high temperature during die casting or improper die design makes the copper die-casting deformed.

The tapping temperature of molten copper should be well controlled, and the red copper is between 1 100 and 1200 degrees. The copper content is about 1000. If it is too high, the element will be lost.