Sashiko thread to dye fine size. Longer: 20 meters. Completion: 100% cotton.Perm: 3 Ply.Mark Olympus - Guaranteed quality. You always wanted to be able to dye your own Sashiko wires personalized easily? It is now possible! Olympus has developed a great dye system, which uses a "dye pen" to literally color your sashiko sons. There is nothing simpler. This new dye system is very simple - load the dye pen, spread your wire on cling film, and off you go. You will have to buy the dye pens separately, used to apply the dye, and the Sashiko wire prepared for the dye. The colors of the dyes can be combined at will to create many different effects. They can also be diluted. It is recommended not to mix the colors used in each pen, because dark colors will stroke the applicator and may discolor the following light dyes. So do not use your yellow dye pen for blue, or blue for red, etc. To get the purest color, keep a pen by dye. The dyes are not toxic but always hold out of the reach of children and animals.