Here's the finished yarn from the silk hankies I was complaining about. The detail above is cropped from this shot. I ended up with about 500 yds.
This is what the hankies look like. I spun each stack onto separate bobbins and plied the two together. The multicolor stack seemed slightly less annoying than the solid stack, but I still probably wouldn't buy hankies again. I don't like the unavoidable neppiness, though the finished yarn appears a little smoother than I'd have predicted.