When working vertical stripes, you must either carry the colors across the back of the work or use separate balls or bobbins for each stripe. If each stripe has four or fewer stitches, carry the yarns across the back. With more than four, use bobbins and twist the colors around each other on every row.
To make a vertical stripe of one stitch in stockinette, knit the piece in the main color, then duplicate stitch the stripe onto it.
If you want the stripes to start at the beginning of the piece, cast on with only one color, then start the stripes on the first row. Or you can cast on using the colors in the stripes, as shown below.
A corrugated rib is ribbing made of vertical stripes in knit and purl stitches. While it does make an interesting effect, it does not have the same give as solid-color ribbing and should be made slightly wider to compensate for its lack of resiliency. It is best worked in knit one, purl one or knit two, purl two ribbing. Remember to always twist the colors on the wrong side of the work to prevent holes.
|casting on for vertical stripes|
1. Using the double cast-on, and with the end of the yarn coming from the skein over your thumb, cast on the first color. Make a slip knot on the needle with the second color. To cast on the second stitch, twist the old and new colors, as shown.
|2. If working in stockinette stitch, purl the first wrong-side row, twisting the yarns at each color change, as shown. Pull the yarn tightly to prevent gaps.||3. On the second (knit) row, twist the yarns by bringing the working yarn over the old yarn.|
|1. On the right side, before a purl stitch, drop the old color. Bring the working color under the old color and to the front of the work between the needles. Purl the next two stitches.||2. Before a knit stitch, bring the old color to the back of the work and leave it. Bring the working color under the old color and knit the next two stitches.|
|1. On the wrong side, before a knit stitch, drop the old color. Bring the working color over the top of the old color and to the back of the work as shown. Knit the next two stitches.||2. Before a purl stitch, drop the old color, bring the working color over the top of the old color, and purl the next two stitches.|