R/bak SF is a Rogers cushion mounting material for flexographic printing on corrugated substrates. It combines a firm open-cell polyurethane cushion with a polyester support. It belongs to an industrial printing-material family, rather than a software or artificial-intelligence topic.
Rogers positions SF as a general-purpose option for solid areas, line work and process printing. The cushion helps manage the contact between the printing plate and the substrate. Its effect must be considered together with the plate, carrier, impression setting and the corrugated material being printed.
The polyester-supported construction is an important distinction from unsupported R/bak grades. Confirm how the selected material will be mounted and whether it fits the existing plate-and-cylinder arrangement. Do not assume the same setup applies when changing between grades or thicknesses.
Assess coverage, fine detail and dot gain using representative artwork. A manufacturer’s description of a cushion benefit is not a guarantee that every press will achieve a particular print density or resolution without setup work.
Selection and validation
Specify cushion thickness, carrier construction, adhesive arrangement, plate thickness and the press setup before ordering. Evaluate print quality through a controlled press trial using the intended ink and substrate. A change in cushion construction may require adjustments to mounting and impression settings.
Official sources: Rogers R/bak SF.
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