Here is a set of step by step instructions with pictures on how to make the aforementioned rolls.
I used Majic Carpet Dyes:
Bottle Green , Moss Green, Chocolate Brown
Begin by laying out the saran ( cling film or plastic wrap) and place wet wool on it. Paint with a brush, I just buy cheap paint brushes and cut half the hair off.
Stipple and stroke the dye on and into the wool.
When the wool is all painted it should look something like this !
Next roll it up using the saran.
You can pop it into a glass measuring cup and micro wave or you can steam it in the basket of your re purposed rice/wool cooker.
The top wool was microwaved, the bottom one processed in the steam basket.