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Plastic and composite doctor blades come up sharp in safety and wear, but steel's metering edge may be tough to beat. By Susan Friedman "Plastics make it possible," a recent American Plastics Council ad campaign trumpets. In the doctor blade arena, plastic and composite blades have offered an alternative to steel for over 20 years. Here's a review of what these materials make possible on-press, most notably, safety perks and wear resistance. Meter credos Supplier perspectives on blade metering capability leave plastics, in particular, a bit behind. Mark Hahn, director of sales and marketing for AAA Press International, Arlington Heights, IL, states in customer