Assembly Preparation

Wax assemblies are typically dipped in an etching solution to remove oil, mold release and any other materials on the surface of the pattern that might inhibit adhesion of the shell. A common misconception is that etching solutions can damage or even dissolve QuickCast patterns, and many foundries avoid etching assemblies with QC patterns. As a result, they sometimes have issues with shell adhesion on wax components of the assembly, especially molded wax sprues.

3D Systems has tested patterns from a number of investment casting resins in both solvent based and citrus based etching solutions.

Based on these results, we see no reason that assemblies containing QuickCast patterns should not be etched in the same manner as wax assemblies.