What is a primary characteristic of all-purpose thread?

The primary characteristic of all-purpose thread is its versatility for most sewing projects. This type of thread is designed to work well with a variety of fabric types, including both lightweight and medium-weight materials. All-purpose thread can be used in a wide range of applications, such as general sewing, garment construction, and crafts. This versatility makes it a go-to choice for many sewists, whether they are beginners or experienced crafters.

In contrast, using all-purpose thread specifically for heavy fabrics or limiting it to cotton materials would not highlight its broad applicability. Additionally, claiming that all-purpose thread cannot be used in machine sewing overlooks its common use in both sewing machines and for hand-sewn projects. This comprehensive suitability reinforces its status as 'all-purpose,' making it an essential item in a sewing toolkit.