Satin Stitch is a beautiful stitch, very common in fine
heirloom embroideries. It consists of long stitches covering
a small shape and lying next to each other, so that no
fabric shows between the stitches. The surface of the
embroidered shape looks smooth and satiny.
When this stitch is not padded, it is often referred to
as the Flat Stitch (although there is another stitch
of the same name).
When it is stitched on an even- or coarse-weave fabric,
and the shape is geometric (such as a square or a star),
it is easy to keep the edges clean by using the fabric's
weave a guide for stitch placement.
It takes a lot of practice to master this stitch, so be
patient with yourself at first. Try the Padded Satin Stitch
unless you are stitching a geometric shape on an even-weave