Originally Posted by
Ginaky
One thing you need to know--rayon threads are not colorfast! When I first got my embroidery machine I used some rayon threads (Sulky)--I quickly learned that and changed to polyester threads.
This is true of rayon but unless it'll be under heavy washing it normally isn't a problem. You also have to watch polyester because it'll melt if you have to iron it. I've also used some cotton (Aurifil) to embroider with, they have great varigated.