Isacord 1000m 聚酯纖維 3151 曙光藍 縫紉線

This blue is exactly the shade I needed for a custom logo job, and it barely broke a sweat running through my machine. The strength difference from rayon is noticeable—no shredding or fraying even on dense satin stitches.

I’ve been using this thread on a tough satin stitch lettering project—the breakage stopped completely after switching to it. The polyester really does run smoother than the rayon I tried before.

It held up through a dense floral design without a single break or fray, even at high speed on my multi-needle machine. The polyester strength really shows in the stitch quality, and the color is a true, vivid blue that pops on dark denim.