With cotton yarn in contrast color, work chained cast on for half the number of required stitches, plus one. With the main yarn, knit one row, purl one row, knit one row. With the purl side facing, *purl the first stitch on left hand needle, insert the right hand needle from top to bottom under purl bar of main color buried in the contrasting color yarn three rows below. Place this stitch on the left needle by inserting the needle from front to back into the stitch, and knit the stitch in the front of the loop. Repeat from *, end with the last purl stitch on left needle. Next row begins 1×1 ribbing and is considered Row 1. Unravel the chained cast on, starting from the tail with the knot. As you pull the chain out, a strand of the contrasting yarn will be in the middle of the tubular cast on. Gently pull it through after you unravel the chain. If the chain does not unravel, there is an error in the cast on and you will need to work the cast on again.
Knit and Purl
k1b: knit 1 stitch through the back loop
p1b: purl 1 stitch through the back loop
sl1: slip 1 stitch from the left needle to the right needle without knitting it
psso: pass the slip stitch over
yo: yarn over aka yarn forward(bring the yarn forward between the needles and take it back over the right needle ready for the next stitch)
yo2: yarn over twice
RT right twist: k2tog, leaving stitches on the left-hand needle; insert right-hand needle from the front between the 2 sts just knitted together, and knit the first stitch again; then slip both stitches from needle together.
LT: left twist: with right-hand needle behind left-hand needle, skip one stitch, and knit the second stitch through the back loop; then insert right-hand needle into the backs of bothstitches, and k2tog through the back loop.
For more information about Cast-on Techniques. Click Here.