Backfill MGE8 for: Epson WorkForce M300 (10K-200G) Epson WorkForce M400 (12K-240G) 1) Full black effect and grayscale of the print made with the use of backfill MGE8 is comparable to the effect of printing on original toner.2) In continuous printing of graphic effects and full black and grayscale (300 copies were printed at the same time), no abrasion or non-fusing of the print was observed.