Franmar One Step screenwash is biodegradable and recommended for Dip tanks.  Reclaiming your screens with this amazing product will enable you to clean the ink and emulsion off of your screen in one step. One Step is 100% biodegradable, safe, and non-toxic.  When working with One Step be sure to include the neutralizer to change the PH level in the solution so that One Step could safely go down the drain. Available in quarts, gallons, and 5-gallon pails.