I am curious to see how different fabric looks when dyed at different stages in the textile creation process. At Coppergate wool was found that was dyed in the fleece with madder (Walton, 1713) and some of the tabbies from the Oseberg ship burial were dyed after the cloth was woven (Ingstad). This got me thinking about how garments that are dyed in the wool, yarn-dyed or dyed after weaving would differ in final appearance and feel.
So now I have a fleece which is cleaned and separated into 3 equal portions (of about 7oz each) which I will process and dye. One sample will be dyed in the fleece, spun and then woven. The next will be spun into yarn, dyed and then woven. The last will be spun, woven and then the resulting fabric swatch will be dyed. All wool will be combed prior to spinning and all samples will be woven on a rigid heddle loom. The dye will be madder and all samples will be dyed at once (with locks, yarn and fabric going into the same dyebath to insure consistency). I hope this goes well as I look forward to seeing how the results compare.
Ingstad, Anne Stein. "The Textiles in the Oseberg Ship". http://forest.gen.nz/Medieval/articles/Oseberg/textiles/TEXTILE.HTM
Walton, P. "Textile Production at 16-22 Coppergate." The Archaeology of York Volume 17: The Small Finds. 1977.