When all is said and done, there is no better dye for natural fabrics than Dharma's Fiber Reactive Procion Dye. Regardless of what you are doing, and for just about every situation, there's a way to use Procion dye. Direct application dyeing is immediately satisfying - colors can be applied with many different shaped items and because it sticks to stuff, it works well with sponges, brushes, blocks, etc. Silk can be tub dyed with cold water using the same method as for cotton which was explaned 3 pages back. The colors on silk are not as predictable nor the same as on cotton.
Mixed colors tend to shift one way or another.
But it is so easy compared to hot dyeing that it is well worth trying. For wood chips or small pieces, cane, reed and anything that can be submerged. A quick and easy way to tie-dye silk. We've had rave reviews for this very simple procedure. Fiber Reactive dye is often used for screen printing in place of fabric paints.