Leaching assemblies, systems, and methods for processing superabrasive elements

A method of processing a polycrystalline diamond element, the method comprising:

• depositing a curable material within a protective leaching cup, the protective leaching cup including a rear wall and a side wall, the side wall comprising:
• a seal region having a first inner diameter;
• an encapsulating region extending between the seal region and the rear wall, the encapsulating region having a second inner diameter that is greater than the first inner diameter;
• positioning a polycrystalline diamond element, which comprises a polycrystalline diamond table bonded to a substrate, within the protective leaching cup such that:
• the curable material is disposed within the encapsulating region so as to surround at least a portion of the substrate;
• the curable material does not contact the polycrystalline diamond table;
• the curable material does not occupy a region of volume defined between the substrate and the protective leaching cup;
• curing the curable material to form a protective layer on at least the portion of the substrate;
• exposing at least a portion of the polycrystalline diamond element to a leaching agent such that the leaching agent contacts an exposed surface region of the polycrystalline diamond table.