How to make Slip Stitch crochet

Insert the needle in the 1° stitch to work (for 1° stitch on a chain base, the needle is inserted into the 3° ch.); take and pass the thread while also through the stitch that is on the needle.

Repeat the above steps in all necessary stitches. At the beginning of a new row, 1° Slip Stitch is replaced by a 1 ch. Then for the next point, insert the needle into the 2° stitch base.