With natural dyes we go back to our routes and the vital connection to plants. The process requires much time and patience but has the value supporting agriculture, our environment and handwork. I couldn't help but see the perfect connection to the fine art of botanical perfume.
Besides some biology and psychology of color we also learned a bit of chemistry that not all the dyes are fugitive and thus must be treated with a "mordant" so that the color can adhere to the fabric for washing. This has to do with positive and negative charges between fabric and dye.