The above photo shows some of my fabrics stuffed in canning jars. I don't know the technical term for this method - "canned fabrics"? This is the result of this method of dyeing fabric.
If you've ever wondered what the difference is between dyeing PFD (prepared for dyeing) fabric and non-PFD fabric, here is the comparison
The fabric above is using PFD fabric.
This one is using non-PFD fabric. Most of the dye washed out even after 72 hours of curing time. :( It's good if you want a pastel fabric though.