I would want all the components to be washable at a hot temperature if I was going to make a baby quilt out of them.
I do not recommend using hot water on a completed quilt, but I do soak my uncut fabrics in hot water now. I start out with the hottest water from my faucet and let the fabric soak in it for at least a couple of hours. I also add a few drops of thr "original" Dawn dish detergent to the water.
I follow Vicki Welsh procedure. Would someone please post the link to that? I do not know how to do that from my phone.
Satins are notorious for fraying. They also come in various qualities and fibers. Some wash up nicely. Some do not.
I had made my grandsons pillowcases of washable sarin when they were toddlers. They dragged them everywhere!