http://www.long-john.nl/vintage-japanese-boros-from-late-18th-begin-of-the-19th-century/japanese-boros-long-john-blog-authentic-blue-indigo-rags-sashiko-technique-vintage-century-farmers-jacket-rags-natural-patched-worker-denim-jeans-workwear-craftsmanship-8/
http://mechantdesign.blogspot.tw/2012/04/japanese-boros.html
http://stencilry.org/main/index.php/how-to-stencil-a-shirt-with-bleach/