MICROSCREEN AS SEPTUMS FOR USE IN METALWORKING FILTRATION IS A RECENT DEVELOPMENT. PRELIMINARY FINDINGS INDICATE THE USE OF MICROSCREEN AS A FILTER SEPTUM MAY REVOLUTIONIZE THE METALWORKING FILTRATION INDUSTRY WITH IMPROVED FILTRATION PERFORMANCE ACHIEVED AT HIGHER FLUX ROLES THAN EVER BEFORE. SEPTUM APERTURE IS SMALLER AND MORE CLOSELY CONTROLLED THAN WITH CONVENTIONAL SEPTUM MATERIALS. THE PAPER REVIEWS THE VARIOUS MATERIALS CLASSIFIED AS MICROSCREEN AND PRESENTS CURRENT FIELD APPLICATION RESULTS AND DATA FROM THE FORD INDIANAPOLIS PLANT.