Corrugated Rib, (c) Sarah E. White.You can make corrugated ribbing in any configuration you might normally use for ribbing, but the difference is that the knit columns are one color and the purls are another.
This makes a really striking border that's great for places that don't need to be all that stretchy, and it's an easy colorwork technique for people to try who might not have done a lot of work with multiple colors before.
Comments
When doing corogated rib, to avoid the cast-on color showing below the first row of purls, knit the first row, the cast-on color bumps will be at the back of the work.