The least exciting part first, shall we? 😀 Cherie Lovell, a follower of my page, confirmed that the serging is a 3-thread for both layers. 🙂 So if you want the same serging, that’s the method to use.
This photo shows well the fading. It’s definitely not intentional. This side, the right side, has a good deal of fading. The left side doesn’t.
Here is the left side, and the fading is very little.
Another of the left showing how little fading there is compared to the right side.