If you use the Zortrax Z-SUPPORT ATP support filament, you also need the Zortrax Z-SUPPORT ATP Activator. Mixed with water, this creates a mild alkaline solution, which works best for dissolving Zortrax Z-SUPPORT ATP material. With the help of this solution, the material dissolves completely, so it leaves no residue. How quickly the material dissolves depends on the geometry, water circulation and water temperature of the printed model.