I documented a lot of these experiments on my Facebook page this summer. I figured it was time to get some of them written up into a more sensible format as blog posts.
This acts as a natural resist and prevents the dye from reaching all the way down to the bottom or inside the folds in some places. I can control this effect to a degree by how much liquid is in the crockpot.
Yarn that is spun from tops dyed with this random crockpot dyeing method still have some variation in color, but the transitions between colors are much smoother and more gradual with little to no striping.
Individual spots of color that blend together as fibers in the yarn give the impression of a solid color due to optical blending while at the same time giving greater visual depth to the yarn.