solutions used in commercial printing presses comprises withdrawing fountain solution from the dampener recirculation system of a printing press and directing the withdrawn fountain solution through a sediment prefilter a separation filter and a posttreatment filter the sediment prefilter preferably comprises a melt blown polypropylene filter the separation filter preferably comprises a diatomaceous earth filter and the post treatment filter preferably comprises a zeolite filter application_number US 39221503 A description referring now to the drawings and particularly to fig1 thereof there is shown a fountain solution recycling system 10 incorporating the present invention the system 10 includes a pump 12 which receives fountain solution from a commercial printing press through a line 14 the output of the pump 12 is directed to a sediment prefilter 16 through a line 18 the sediment prefilter 16 comprises a housing 20 which contains a strainer or filter formed from melt blown polypropylene and having a consistency generally similar to that of a fibrous web the function of the sediment prefilter 16 is to remove relatively large particles from the flowing fountain solution from the sediment prefilter 16 the fountain solution is directed to a separation cartridge 22 through a line 24 the separation cartridge 22 comprises a housing which contains a diatomaceous earth filter and functions to remove sub micron.