The double crochet stitch is about twice the height of a single crochet stitch. (It is called a triple or treble crochet stitch in England and several Commonwealth countries and is abbreviated tc or 3-c.) In American notation, it is abbreviated dc. The photo at the right is from the American Thread Company booklet and describes the stitch.
In the photo, you can see both the right sides of dc sts (the top row) and the wrong sides (the bottom row).
NexStitch has a video of the stitch. The video shows the dc being made in a chain st (with the hook being put under just one loop of thread). In the pattern we're working on, the dc is made on top of a sc and so (since we want a flat effect instead of a rib effect), put the hook under both loops at the top of the sc. -- For a further discussion, look at the last 2 paragraphs of the previous article on crocheting.
The single crochet stitch took 2 steps to complete. The double crochet stitch takes 4 steps. As with most, if not all, crochet sts, one starts with a single loop around the hook -- and ends with a single loop around the hook.
Step 1. Yarn over (yo). That is, wrap the thread around the hook (from the back over the hook to the front). There are 2 loops on the hook.
Step 2. With the yarn in back, put the hook through the top of the desired st -- or whatever (as you did for a single crochet st), yo, and draw the thread through. There are now 3 loops on the hook.
The picture at the right shows the yo in Step 1 and the hook through the top of the stitch that I wanted to dc into. (I skipped 2 sts between dc's because that's what the pattern I'm making calls for.)
Step 3. Yarn over and draw the thread through 2 loops on the hook. There are now 2 loops on the hook.
Step 4. Yarn over and draw the thread through 2 loops. There is now only 1 loop on the hook, and the double crochet is complete.
The picture at the right shows the yo in Step 4. You'll notice that bottom half of the stitch is already made.
Now to get back to the terry cloth dish towel that we were working on. The final picture shows the end of the row of sc's from the directions from last week. The next row of work is a row of dc's and ch's -- to give an open mesh effect.
Row 3. Turn, ch3, dc in next st in previous row, *ch 1, skip 2, dc 1* across, dc in last st.
To explain these steps:
Turn -- Turn the fabric so that now the RS is facing you. We were working on the WS.
Ch 3: Chain 3, as a substitution for a dc.
dc in next st in previous row: Don't dc in the last st of the last row but rather one stitch over. (Sometimes, one just writes dc instead of dc 1.)
*ch 1, skip 2, dc 1* The pattern that is repeated across the row is to first chain 1, the double crochet in the 3rd stitch over from the last stitch crocheted into (to skip 2 sts).
Finally, the pattern will, in most likelihood, not work out exactly. So, you can fudge by skipping only 1 st before making the last two dc's of the row or else by ending dc, skip 1, dc. -- As was the case in the last row, there are fewer sts across than in the previous row.