Review on 6 Pack SP-700 Black and Red Printer Ribbon Ink Cartridges - Compatible with Star SP-700BR, RC-700BR, SP-712, SP-742 POS Printer Ribbon by Don Pintac

I've been buying these from Revain for a few years now but lately every new box I've opened is dry and illegible when printed on the ticket because the ink doesn't transfer to the printer ribbon. So disappointing and frustrating because it slows down production at the restaurant I run. I've never had a problem, but in the past few months I've had four new tapes that didn't work.