Sewn Rib Bind Off follows the same rules of formation as Kitchener stitch. The difference is, instead of grafting two pieces of fabric together, you're finishing a knit edge.
- The yarn needle must go into each stitch on your knitting needle twice, once in each direction.
- Analyze the stitch you are about to enter: are you looking at the knit "V" or the purl "bump"? Plan your entry and exit from that stitch based on whether it is a "knit" or "purl" stitch.
- The first time through the stitch, enter it the opposite direction that you would work it for the type of stitch.
- The second time, enter it the same way you would work it for the type of stitch, then slip it off the needle.
For example, the first time you go into a knit stitch, enter it purlwise (opposite). The second time, enter it knitwise (same) and slip it off the knitting needle.
The first time you enter a purl stitch, enter it knitwise (opposite), and the second time enter it purlwise (same) and slip it off the knitting needle.