Abstract: A substrate ion exchange system is provided for a multi-component ion exchange bath that minimizes stratification effects within the bath, along with methods of mixing such baths. The system includes a substrate having an outer region containing a plurality of substrate metal ions; an ion exchange bath with a first metal salt and a second metal salt; and a vessel for containing the ion exchange bath and the substrate. The system further includes a mixing apparatus configured to mix the bath such that the metal ion concentration associated with the first metal salt in the bath is substantially uniform within the vessel. The substrate metal ions are exchangeable with metal ions from the first and second metal salts. Further, the first and second metal salts are miscible and molten.