i use alot of duponi silks! i have not had any problems with laundering the quilts that contain the silks, they wash up and stay beautiful!...the only problem i've ever had using silks in quilts is they do tend to fray alot, so it is important to make sure the seams are well-made...i use a 1/2" seam instead of 1/4". other than that i've had no problems