Ssam sol is used to make Hot Bo(single layer bojagi).
First, fold seam line(1/4inch) using the bone folder.
Put two folded seam parts together.
Baste in the middle of two seam lines.
Fold one end backward and stitch using Gamchimjil(whip stitch/overcasting stitch) technique.
Iron the seam line with low heat.
Turn the fabric over.
Fold the other side seam line backward and do Gamchimjil.
Now we can see two seam lines.
Take the basting thread out.
Iron again with low heat.