These photos are from one of the classes I took at the quilt show in Chicago last week, Maggie Backman of the Silk Experience was the instructor.

In the photo above, my classemates are dying small pieces of silk in plastic baggies. The fiber reactive dye is called "Colorhues" (available from the Silk Experience
http://www.silkthings.com and other sources.) I'm really disappointed they don't have photos of some of the things they've done with the dye on the website - the colors are so brilliant and the way they react with silk is like magic.
Here is a close up from the first shot showing how brilliant the color is - she would have been one of the first to dip her fabric into that batch of dye.

Above, you can see the same group and some of the bright colors - and some results below. This appears to be some of the silk dupioni, having been dyed and overdyed using at least two colors.

And these are my little pieces - the pink is the same dupioni - I only had it in the dye for a few seconds and after it was well used by other dyers. And I didn't dampen the piece first before crumpling it up and putting it in the baggie, so there are areas with no color. The smaller green piece was dyed after the larger one, then overdyed with blue. It's a smoother weave than the dupioni which, due to its inherent characteristics, really takes on the color with a lot of variation.
The whole process was painless and took only seconds. You can see we are not wearing gloves. I can imagine dying more pieces, putting them into a simple quilt and adding beautiful quilting for texture.