How many threads should I use for satin stitch?

HOW MANY STRANDS OF FLOSS SHOULD I USE FOR MAKING THE SATIN STITCH? The lesser strands you use, the smoother finish you will get with the design. I prefer using 2 strands of floss for making the satin stitch. At times, I use just one if the design calls for a smoother finish or 3 strands as per necessity.

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