Use a mending thread significantly lighter in weight (thinner) than the thread used to crochet the lace. This allows stitching to be hidden, yet bars can be built up to the appropriate weight with several passes. Select the finest, thinnest needle available. With a very thin needle, it will be possible to slip the needle through the bars without breaking them. The heaviest thread shown here is a common sewing thread in a beige -- it is too heavy and too dark. The finest is a lacemaker’s thread -- actually too thin and also too dark. The center thread was selected -- light enough but not too light in a white that blends well.