I have dyed 7 pieces of fabric with Heather's recipe for 'that perfect colour', using three parts turquoise to 1 part boysenberry, and using hotter than normal water. I started with very strong dyes, then decreased the concentration by a factor of 2 for each subsequent dye bath. As I did not have 7 buckets available I used large plastic bags, but attempted to manipulate the fabric as much as possible to get reasonably even colours. The seventh piece was pure cotton, dyed the same concentration as the 6th, but for the rest I used a silk/bamboo satin fabric. In Canada I had loved using a Kaufmann fabric, Radiance, which was a silk/cotton mix and which dyed a slightly different colour on each side. I was hoping this fabric would do the same.
Here's the results!! The fabric on the far left is the cotton, the rest are the silk/bamboo mix, going from least dye on the left to most dye on the right. The fabrics are folded so that you can see both sides of each piece. As you can see, I got vastly different results from the two sides of the fabric!! The single cotton piece dyed far more evenly; whereas the silk sucked up the boysenberry dye, leaving the bamboo side much paler and generally bluer, and both sides showed a larger variation across the fabric. I presume this was because the dye struck much faster on both the bamboo and the silk than the cotton.
I think I may have to order more of this fabric, but perhaps I had better play with these pieces first.