For this blanket I unravelled this Spirit of the Andes alpaca tunic. The yarn is nice, thin, soft, presumably undyed. The body and sleeves are knitted in the round, with the raglan sleeves sewn in. Unravelling the patterned cable stitch is more interesting than plain stocking stitch.
Without thinking I put the yarn in the washing machine on a normal wash, and this is how it came out. It was not very difficult to get hold of an end and pull it away for winding into a ball. And since it was alpaca it didn't break easily. It made the yarn nicely fluffy. This was just the first two hanks. I will wash the rest in a more considerate way.