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This is about crocheting a loose and easily decorated chain stitch: If you have trouble making your beginning chain loose and stretchy enough, switch to a hook at least one up to three sizes larger than the hook you need for your pattern. This will make your chaining row looser, and when you start with the correct hook, you will have no choice, but to follow the looseness of the beginning chain.
Also in starting the second row of your crocheting pattern (mostly for items such as afghans or scarves that will get a decorative edge), turn and crochet into the back loop of the stitch, that way the top and bottom edge of the crocheted project will be exactly the same, with the top of the stitch as the edge to add decoration to.
Source: teaching crochet
By AnniesArtifacting from Reading, PA