Twin Machine Needles
4mm Ball Point Twin Needle; size 80/12 by Klasse.
4mm Stretch Needle; size 80/12 by Klasse.
(choose your twin needle in line with the machine needle used for your fabric- ie if you've used ball point for the rest of the project choose a ball point twin)
When hemming a stretch knit T-shirt or leggings, is to use a twin (sometimes called a double) needle. The single shaft has two needles to create the parallel lines on the right side similar to the cover stitch effect and on the reverse the bobbin thread produces a zigzag as it travels between the two needles. This works because the zigzag stitch of the bobbin straightens out when the fabric is pulled so that the thread does not break! It is also important to buy a stretch twin needle for sewing knit fabrics because a standard/universal twin needle will cause missed or skipped stitches on the surface.
Easy to attach to my janome machine, take your time threading and they work a charm. What’s fantastic about the sewing institute is that these products are tried and tested. I attended the jersey workshop so Lucy demonstrated how they go on my machine and how to use them for a professional finish.