Yes! All of our colors are set and will not run. Our ribbons should be washed by hand in a pH neutral soap (silk does not like alkali environments) and carefully rinsed a number of times.
Chiffon is very fragile and is probably best rolled flat on the hand first to make a bundle then gently lowered into the water and just move up and down.Line dry until just damp and then press them.
For our original ribbons you can pull them slowly under a hot iron. If this silk dries too much the creases will not iron out. Spray with water until damp and press. Or you can make a lovely textured ribbon by deliberately letting it dry scrunched up.
Washed crinkles can be left to dry and they will stay crinkly, or pressed flatter when partly dry.
The gauze ribbons are best pressed when damp so either catch when partly dry or spray. Again use a fairly hot iron.
The chiffon ribbon is very delicate and best pressed when dry. Lay it partly on the board, spray, then iron that piece gently (it can stretch). do it section at a time.