Historical version 1 of Kake's Rainbow Hemp Jumper - Sleeves (view current version)
See also Kake's Rainbow Hemp Jumper - that page was getting a bit long so here's a separate one for the sleeves part of the pattern. Copyright on this pattern as described on that page.
Making up the body
Join the shoulder seams. I used a 1.25mm crochet hook to slip-stitch them together with wrong sides facing, using the leftover tails of yarn from changing colours so that the yarn I was using to do the joining was always the same colour as the fabric I was joining.
Join the side seams. I used the [three-needle bind off]?. I'd considered using Kitchener stitch but with 90 stitches to join it would have been a bit rough on the yarn.
Left sleeve
You should have stitches on a holder (from the front) and a provisional cast-on (from the back. With right side of garment facing, put these stitches onto a circular needle.
(The next bit might make more sense if you first read about Medrith Glover's strip-joining technique over in modular knitting.)
With right side and front of garment facing, and yarn colour B, pick up and K 13 stitches from the underarm selvedge beginning at the border between the colour A stripe and the colour B stripe. (Place marker if required.) Continue knitting onto the stitches on the circular needle. When end is reached, pick up and K 13 stitches from the other underarm selvedge, ending at the border between colours as before. Turn and P back 13 stitches so you're back on the main stitches again. (Place marker if required.)
- P to last main stitch but 1 (stitch before marker). P2tog using the last main stitch and the next stitch picked up from selvedge. Turn.
- K to last main stitch but 1. K2tog using the last main stitch and the next selvedge stitch.
Repeat these two rows 12 more times until all 13 picked-up selvedge stitches have been used.