Historically, indigo was a natural dye extracted from plants, and this process was important economically because blue dyes were once rare. A large percentage of indigo dye produced today – several thousand tons each year – is synthetic.
There is a place called Sanbao in Guizhou province of China.The old national people still use the plant bluegrass handmade indigo dye fabric.
They hand stitching, surrounded by spools of thread.After stitching and the fabrics are pulled tight to resist the dye.color turning white material into beautiful patterns.Finally, the magic is revealed after all the stitches are removed. That is an exciting moment, since we can't be exactly sure how the finished piece will appear.