Machine Quilting Thread Overview

Machine Quilting threads, and threads in general, are usually labeled with two numbers. The first number refers to the size thread (denier), and the second refers to the ply, or how many strands are twisted together. The lower the thread size number, the thicker the thread.

Generally, man made fibers are stronger than natural ones. Therefore, threads with polyester, acrylic or nylon content will be less apt to fray and break than a cotton thread.

When selecting threads, compare color, sheen, texture of thread to determine the effect that you desire, e.g. metallics are shiny and sparkling, rayon produces a high sheen, silk a subtle sheen, and cotton provides matte luster.

For additional information about machine quilting threads, check out our Machine Quilting Thread article.

Cotton

Cotton is easy to use, readily available and comes in a multitude of colors including variegated. Most cotton threads are colorfast and have little to no stretch. Not all cotton thread is made equal though: a poor quality cotton thread will have a fuzzy finish, whereas a good quality thread will have a smooth finish. Polyester wrapped cotton is stronger than cotton, but the wrapping process also produces a more abrasive thread with a rougher texture.

Rayon

Rayon thread has a high sheen, but is not as strong as cotton. It is neither colorfast nor shrink resistant and it should be used only for decorative purposes.

Polyester

Polyester thread comes in a wide range of colors including variegated, and is strong, durable and colorfast. It can be used for construction or for decorative purposes.

Metallic

Metallic thread can add sparkle to your project. These threads are generally more fragile and difficult to use than other threads, however with the proper machine needle and tensioning, are well worth the effort.

Silk

Silk threads have a wonderful luster and are strong and easy to use, although expensive.

Monofilament

Monofilament, or invisible, thread is available in clear, black and smoke colors. It is available in both polyester and nylon, and is made to "disappear" against the quilt surface. It does have a slight sheen which can produce an undesirable visual effect, and has a tendency to stretch. If using in the bobbin, it should be wound on by hand or very slowly using the machine winder.

Polyester
- has a higher heat resistance, does not go brittle or yellow over time, and is softer than nylon.
Nylon
- has a tendency to go brittle and turn yellow over time, and has a low melting temperature.

	Monofilament Comparison Chart
	Sulky:	poly
	Superior:	poly
	Coats:	nylon
	YLI	nylon
	Madeira:	Polyamide (nylon)

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