5-6 months - Start in February 2025 - The use of cellulosic substrates for printed electronics is a major advantage, enabling electronic equipment to be recycled and the recovered fractions to be recycled. Electronics are often printed on plastic, which makes recycling difficult if not impossible. In 2019, of the 53.6 Mt of electronic and electrical waste produced worldwide, only 17.4% was properly collected and recycled. Printed circuit boards contain the majority of precious metals (Au, Ag, Pd, Cu, etc.). However, the widely used epoxy resin-based substrate makes it difficult to extract and recycle these metals. This support can be replaced by a paper support. The results of the CircEl-Paper and REVeBIO projects have shown that it is possible to optimise conventional paper recycling processes in order to successfully separate silver inks from cellulose fibres.