Zigzag Vs Straight Stitch Strength(s)
by Kelsi Watts: A straight sewing stitch is strong because it focuses all of the fabric tension along the same axis(same line) between two pieces. 100% of the thread in a straight stitch is directly holding both pieces together.
A zigzag stitch makes the thread alternate in direction between each side, effectively increasing the amount of thread used but decreasing it's strength. However, in terms of durability, the zigzag stich is more durable overall.
Popular thread for serger sewing machines
The most popular thread used in serger sewing machines is Polyester thread because of it's strength, durability and flexibility. Some sewing projects require a specfic thread type, such as nylon or cotton thread, but most do not.
Polyester thread also has the benefit of being slightly less expensive and more durable overall.
Extra strong thread use in sewing machines
Heavy threads are absolutely stunning to work with. Whether hand quilting stand-out stitches or machine quilting bold outlines the beautiful textural effects of thick strong thread is appealing.
While it's certainly important to consider thread strength requirements for structural purposes don't forget the aesthetic appeal of thick extra strength threads.
When to use cone thread
The term 'cone thread' simply means a larger spool holding more thread than your average spool of thread. It's called cone thread because of the shape of the spool which is cone-shaped (wider on one end).
The two main benefits of cone thread are a) the ease with which the thread comes off the narrow end of the cone and b) how much additional thread it contains for larger sewing projects.
The best thread for embroidery
Stranded cotton thread, sometimes called embroidery floss, is the preferred thread for embroidery. It is the most commonly used thread on embroidery projects, including cross stitch, because of durability and ease of use.
6 individual strands of fine cotton thread are combined to make a single embroidery floss.
The best thread type for your sewing machine
Polyester thread is best to use for sewing synthetic fabric on your sewing machine. This is because Polyester can stretch a small amount making it more forgiving than cotton.
Polyester thread is less likely to shrink when compared with cotton thread. For natural fabric, cotton thread with a Polyester core works extremely well.
Bobbin thread does not need to be the same color
When your top thread tension is properly set on your sewing machine the bobbin thread will not be visible in the finished product. For that reason your bobbin thread does not need to be the same color as your top thread.
To be safe avoid using high contrast color combinations, however, typically any bobbin thread color will work.
Best overlock thread colors to use
For ease of use try to match the tone of a fabric but not necessarily when choosing overlock thread. Example: Use a medium green thread in an overlock stich over a dark green fabric.
The benefit of this approach is that the slight contrast makes it easy to see where your overlock stich threads lay.
How to spot good bobbin thread
Good bobbin thread is as strong as any sewing machine top thread. Go ahead and compare their tensile strength by seeing how easily they break. Pull the bobbin thread tight and scratch it lightly to see if it frays. Good bobbin thread should not be any more breakable than standard high quality thread.
The strongest sewing thread is …
Nylon thread is considered the strongest sewing thread due to its high strength to weight ratio. Nylon thread is a great choice for stitching upholstery, leather, and vinyl.
For smooth stitches while sewing at high speed use Nylon thread treated with a friction reducer.