But it does exist in machine knitting anyway. The Toyota machines do a technique called Simulknit that is a different color on each side and any pattern image has the 2 colors reversed on the opposite sides. It involves using the ribber, which is why I was thinking it had things in common with corrugated ribbing, just denser. It has always intrigued me, but I never did get myself a Toyota machine to try it and Brother machines can't do it, or so I've always been told. They can do double-jacquard, but that's a double bed slip stitch technique and produces only stripes or pin-checks on the back, no matter how intricate the front.
Helen "Halla" Fleischer, Fantasy & Fiber Artist