Prior to adding the weld charge to the graphic mold, _______.

The correct answer is to place the metal disc cone side down before adding the weld charge to the graphic mold. This positioning is essential because it ensures that the flow of the weld charge is directed properly during the welding process. When the cone side is facing down, it allows for a more efficient release of the charge into the mold, promoting better alignment and contact with the surfaces being welded. Proper placement is crucial to achieving the desired weld quality and integrity.

In contrast, any other position would likely disrupt the flow of the melt or not provide the optimal arrangement for the interaction between the welding materials, potentially leading to incomplete welds or defects in the final product. This emphasizes the importance of following specific procedures in welding preparations to ensure successful outcomes.