Stitch density is the distance between stitch lines traveling in the same direction. The lower the number and/or percent, the closer the stitch lines are. The higher the number and/or percent, the further apart the stitch lines are. The example below shows low,10 point sitch density, compared to higher, 5 point stitch density.
Proper stitch density is a huge determining factor in a great looking embroidery design. But be careful, setting the density level too high may cause embroidery to look and feel rigid or stiff. Also, certain materials, such as leather, could possibly be damaged by using the incorrect stitch density. It’s also important to remember that optimizing stitch count will help maximize embroidery production, especially on high volume orders! Using unnecessarily high stitch density increases stitch count, which can cut into profit margins, as well as increase stops for bobbin changes, thread breaks, etc. But, using the proper stitch density will help your machines run smooth and trouble-free (and also help you maximize that ever-important bottom line!)
Different fabric types require different stitch densities. Learning how to optimize stitch density will help you produce consistent, high-quality embroidery on a number of different products. There are some guidelines to help with this, but practice with your preferred embroidery software and machine is the best way to learn. Experiment with different settings using a test design on various fabric swatches, and note what works best.