Provisional Cast On is used when you want to create an edge that can be released to create live stitches later for the purpose of knitting in the opposite direction or for seamlessly joining with your stitches at the top of the work with Kitchener Stitch—for instance, to create a cowl or a hatband. It is typically created by making a crochet chain with scrap yarn around your knitting needle for your cast on stitches, which will be unravelled later when you are ready to put your stitches back on your knitting needle to work.
Photo tutorial below the video (or download PDF from this link):
Provisional Cast On Video Tutorial:
Provisional Cast On Photo Tutorial
You may want to check out the following patterns:
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