Using scoured fabric, fabric can be shibori folded and introduced to the indigo bath. After just 4 minutes the dye will be dark enough to remove. Lighter colours can be achieved by using less time and darker colours can be achieved by multiple dipping of the fabric. The magic of indigo is that when it is taken out of the vat, the fabric is green. In this photo you can see how the earliest bundle removed is quite blue where the ones at the top of the photo are green. As the indigo oxidises the colour change happens right in front of your eyes. It is quite amazing to see this happen.