Okay so I ran a little experiment this weekend. I did two runs of six fabrics. I made some mistakes but I learned a lot.
I use dyes from Dharma. This weekend was hot (high 80s) and I dye outside. The first run was using Light Red (Dharma PR12) and Grape (Dharma PR117). I messed up the steps and didn't do them at the correct proportions for 3, 4, and 5, but I still like the colors.
Grape to Light Red
http://ridethepig.com/FabricAlchemy/images/071909_lr_g_stacked_sm.jpg
The second run was using Fire Red (Dharma PR10) to Imperial Purple (Dharma PR131). I had expected a result similar to the first but perhaps darker. I was wrong.
Fire Red to Imperial Purple
http://ridethepig.com/FabricAlchemy/images/071909_fr_ip_stacked_sm.jpg
The Fire Red is one of my older dyes and at this time it looks nothing like a red and more like an orange. So instead of getting the berry colors on the other I got the brownish colors in the mid range.
I only let the cloth cure for a couple of hours and the colors weren't as rich as I expected. I want to do some more experimenting to see if it's the length of time I'm doing the various steps or if it's the strength of dye I'm mixing or if it's maybe my water.
It's always a lovely surprise!