Tunisian crochet, also known as Afghan crochet, uses an elongated hook with a stopper on the handle end, called an Afghan hook.
In Afghan crochet, each row is worked in two halves: the first half is worked from right to left and the second half from left to right. Work is never turned.
After the starting chain is completed, the first row is worked by inserting the hook in the chain, pulling a loop from the free end of the yarn, and inserting the hook in the next chain without working the loop off the hook. At the end of the row, you will have as many loops on the hook as there are stitches across. In the second half of the row, you will work the loops off the hook.
This type of crochet creates a dense fabric with a definite front and back side. It is ideal as a base for cross-stitch. A sample cross-stitch of a Welsh dresser Cross-stitch is a popular form of counted-thread embroidery in which X-shaped stitches are used to form a picture. ...
Crochet is different to other methods of fabric-making as it is composed entirely of loops and is only secured when the free end of the thread is pulled through the final loop.
Crochet on the double, which may be called "cro-hooking", "reversible crochet" or "crochenit" is a crochet technique using a double ended crochet hook (cro-hook) which quickly produces a soft, knit-like fabric.
Tunisiancrochet uses a tricot hook which is similar to a standard knitting needle with a hook rather than a point.