What, in your experience, makes a very round, springy yarn? I'm thinking of yarns like
Koigu or Cascade 220--tightly spun but still very springy and squishy. Is it just the fiber? The prep? The firmness or style of spin?
I managed a yarn that came out in this way once,
seen here. Interestingly, this was spun from some mill-end roving from Blackberry Ridge, whose yarns are also quite bouncy. From this, my guess is that the fiber has a good deal to do with it--this wool had quite a short staple length (2-2.5 inches), was quite crimpy, fairly fine, and I believe the fiber was carded rather than combed because the fibers were not very well aligned. At the same time, I'm working some Ashland Bay merino top into a
laceweight yarn, and while I love what I'm getting, I'm finding that it has comparatively few wraps per inch, even if I put what seems like a monstrous amount of twist into it.
The reason I've been thinking about this is that I recently bought
two pounds of Shetland roving to make a sweater with. My very vague thought is that it'd make a lovely cabled sweater, so long as I can spin an appropriate yarn that will show off the cables well.
Your thoughts?