Why do you use provisional cast on?
A provisional cast-on is temporary and can be unravelled to reveal live stitches that can be knitted in the opposite direction. This is very useful for folded trims, hems and when you ‘re playing yarn chicken and don’t know quite how long to knit something
How do you end a provisional cast on?
When you finish, you’ll need to remove the provisional chain. To do that, pull the yarn end out of the last chain stitch. Tug on it, slowly unraveling the chain until you start to see live stitches.