Protein-based fibers such as silk, wool, and feathers, as well as the synthetic polyamide fiber, nyloncan be dyed with acid dyes.
Ikat is a method of tie-dyeing the warp or weft before the cloth is woven. In order to be effective on different fibers, these dyes are composed of several different dyes, and thus are less effective, and more likely to bleed and fade, than pure dyes designed for specific fibers.
The areas of the fabric that are against the core or under the binding would remain undyed. Discharge agents are used to bleach color from the previously-dyed fabrics, and can be used as a reverse tie-dye, where application of the agent results in loss of color rather than its application.
The soda-ash soak might seem like extra work, but Moskell says that skipping this step is a rookie mistake.
Another difference is that the base color is black. At last, you can remove the bands, and undo the spiral to admire your creation. Letting it rest overnight is even better.
Soda ash sodium carbonate is the most common agent used to raise the pH and initiate the reaction, and is either added directly to the dye, or in a solution of water in which garments are soaked before dyeing. Pop it in the dryer to further lock in color.
Household bleach sodium hypochlorite can be used to discharge fiber reactive dyes on bleach-resistant fibers such as cotton or hemp but not on wool or silkthough the results are variable, as some fiber reactive dyes are more resistant to bleach than others.
If a modern kit is used, then it is easier to accomplish a spiral or circle. Shibori includes a number of labor-intensive resist techniques which include stitching elaborate patterns and tightly gathering the stitching before dyeing, forming intricate designs for kimonos.
Procion dyes are relatively safe and simple to use,  and are the same dyes used commercially to color cellulosic fabrics.