This project made possible by funding from The West Oxford Agricultural Society ~ presenter of The Fryeburg Fair

Wednesday, August 17, 2011

Crochet Double Hyperbolic Plane Pattern for the Maine Reef

So here is this week's homework :-)

The Double Hyperbolic Plane is a great pattern that mimics some beautiful forms of sea life. Sea Slugs and Giant tridacna clams are the two that bring great possibilities with this pattern! Playing with color and experimenting with different size yarns, hook and rate of increase can keep you busy for days!

The main difference with this pattern from the other hyperbolic planes is that you work both sides to create an oval shape. The same basic stitches are used as for the other hyperbolic plane patterns posted before.

So let's get started!

Yarn: I used worsted weight but any yarn will do. Thick or thin and any texture however if you are new, boucle or textured yarns might be tricky and can be hard to work with.

Hook: I used a G hook but if you are using a thinner yarn, you might want to go down a size or two with your needle. The smaller the needle ratio to yarn, the tighter and more rigid the piece will be in the


-  Ch 12
-  Sc in the 2nd ch from the hook, *2 sc in the nxt st,  sc in the nxt 2sts, repeat from * to the last chain
-  Sc in the last chain until you have 6sts to give ease
-  Begin working on the other side making an oval with a *Sc in the nxt 2 sts, 2sc in the nxt st, and
   repeat until the piece is your desired size and tie off.

If you have made any of the other basic patterns, by now you know that it's easy to change it up. Instead of increasing every third stitch, you can try every 4th, 5th, or any interval that you like. Each will give you a different look.
You will note that if you choose to increase less frequently, it will take longer for the curling to appear. So, if you want to create a larger piece, you might try to increase every 8, 10, or 12 stitches. Increasing every 2 or 3 stitches will make it a bit cumbersome to make a very big because you will have so many stitches in a small working space very quickly. It sometimes will seem you will never get around it!

But don't let me discourage you! I intend to make several very large pieces at some point in this creative process. For right now? I'm with you. I'm mostly experimenting and having fun with quick little projects for instant gratification. Ok so I throw in a Giant clam once in a while.

The photos that I've included are my own experimentations. The Giant Clam shell was free formed but the blue portion is a double hyperbolic plane that I made separately and attached after completion.



  1. I really love the way you made the clam in the third picture. We saw some _Tridacna_ at the Waikiki Aquarium this morning and they really do have such brilliant colors contrasted by the neutral exterior! I just wish they were found in Hawaiian waters so I could add them to our exhibit. No matter - I can still try to make some for your exhibit!

  2. Glad you liked it Michelle!

    We'd welcome your attempt!
    Our reef is not limited to what is found locally :-)