PROVO-Yudu Silk Screening Emulsion Remover Concentrate. Reuse your Yudu screens by easily removing the old emulsion sheets. Combine your emulsion remover concentrate with water and follow the instructions to reclaim your old screens. Since the emulsion remover is biodegradable, it can safely be washed down the sink while cleaning your old screens. You'll be ready to reuse your screen in minutes. This package contains one 2oz/59.14ml bottle of concentrate (enough to clean approximately 20 screens in about 30 seconds each). Conforms to ASTM D4236. Made in USA.