This is a great tip from Judy Szabo on The Silk Painting Gallery Network
Try dissolving lots of salt in warm water and paint on already dyed silk wet or dry. The effects are amazing depending how much salt you use. Also if you paint the silk first with this substance, let it dry and paint on it you will get the most beautiful crystalized patterns. I have tried it with painting small flowers, it was lovely, unfortunetly I have no photos.
CLICK HERE to see some of Judy’s lovely silk paintings.