Plying Tips for Balanced Yarns
I LOVE this article by Holly at HJS Studio!
The 2-color pencil roving I just spun lent itself really, really well to using the tip she shares for checking the balance of the yarn while plying. Basically, the yarn will be balanced when the fibers in the singles are parallel to the plied yarn. This should be visible in the photo above, but go to the flickr page and look at the large version if you want to.