This piece is called Shell and is worked on a heavy cotton fabric and is 30cmx50cm. I have used a technique called Guntai stitching where the stitch is similar to a Whip stitch but pulled up very tightly as it is done so that areas of the design twist in interesting ways to form the pattern. It works best on longer thinner areas .
This is a piece of Katano Shibori that I completed using the sewing machine in place of hand stitching as this would have taken too long!! After I concertina folded the piece 5 times I stitched my design and placed it in the Indigo vat for 3 short dips. After you unpick the stitching your design will be revealed and as you can see the inside takes less dye than the outer edges as the dye won't penetrate as far into the fabric. It will also depend on the complexity of your design and thickness of fabric.