Internship opportunity at LGP2 - Feb-July 2026 - In 2022, 62 billion kg of electronic and electrical waste was produced worldwide, and only 22.3% of this waste was properly collected and recycled. However, the widely used epoxy resin-based substrate makes it difficult to recycle and extract these metals. This substrate can be replaced by a paper substrate: studies have been conducted using virgin and recycled fibers to develop the substrate. Encouraging results have been obtained for recovering high value-added materials such as silver.