What cleaning solvent is specifically recommended for removing uncured resin from SLA printed parts?

The cleaning solvent specifically recommended for removing uncured resin from SLA (Stereolithography) printed parts is isopropyl alcohol (IPA), typically with a concentration of 90% or higher. IPA effectively dissolves the uncured resin without damaging the cured resin of the printed part. The concentration is important; lower concentrations of IPA contain more water, which can leave a sticky residue on the part's surface. The cleaning process usually involves submerging the printed part in an IPA bath and agitating it gently to remove the uncured resin from all surfaces, including internal cavities and intricate details. Some automated cleaning stations use ultrasonic agitation to enhance the cleaning process. After cleaning, the part is typically allowed to air dry completely before undergoing post-curing. Proper cleaning with IPA is essential for achieving a smooth, tack-free surface and maximizing the mechanical properties of the final part.