First, install a new embroidery needle in the machine. A dull needle can snag or tear the fabric making the results anything but fabulous.
Next, consider the hooping. Because the sash is too narrow to fit in a hoop and you don't want to damage the delicate satin fabric, the best method to use is hoopless embroidery.
Hoop a water-soluble stabilizer. Using a damp sponge or cloth, moisten the stabilizer to activate the adhesive. Position the sash on the stabilizer, and then smooth it in place.
Embroider the design. After embroidery, carefully pull the sash away from the stabilizer.
Remove the excess stabilizer following the manufacturer's instructions.