When done in large sections, the resulting "stitches" look like they were knitted there to begin with, intarsia-style. When done stitch-by-stitch, as they are in the Web Letter this week, the resulting look adds a delicate touch of color to a formerly plain knit. You can use it to add monograms or lettering to your knits also. One of my favorite applications comes from Elizabeth Zimmermann, who used duplicate stitch to add names, years, or messages to the inside turned hems of sweaters. Be sure to write it upside down so the wearer can peek at it!
Before beginning, examine your knitting. On the knit side, there are rows and columns of V's. You will be inserting your needle through the bottom of the V from back to front.
Then take your needle under the V of the stitch above and back through the bottom of the V where you started. That's it! When duplicate stitching horizontally, your next step is to bring your needle through the V from back to front on the stitch to the left (or right) and repeat the process. For vertical stitching, bring it through the V of the stitch above...
The video below shows duplicate stitch in action from right to left and then into the row above. As always, thanks for reading!