The technique is stockinette with manual knit weave.
Method: Cast on with waste, ravel cord, then knit 1 row.
K4R, then weave the Ribbon yarn OVER 1 needle and UNDER 2 needles. Knit 4 rows and repeat.
To finish, take hold of the scarf end at the cast-on row, twist the end, hang open stitches up onto the needles on the bed. Cast-off in your chosen method.
The edges curl to give a finished side edge.