Sewing How to add silky trim?

It's called piping. The silky material (or it works with most other fabrics too) is cut into long strips. The cord (usually a thin rope or thicker yarn) is put in the middle of the strips and the fabric folded over and sewn onto itself, trapping the cord in place. Then you sew it to the garmet so that the trapped cord is the only part shown.

Lol it's a little hard to describe, lemmy find a link for you.

Here we go, this has lots of pictures and tips: How to sew with piping: the best tips and tricks (

 

Happy to help! It's always fun when I can be like "wait I know what that is!" haha.

 

Great question, I just learned something new!

 

There are lots of premade piping available too. Very cheap.

Here is satin in many colors (which is what I think you mean by "silky")

https://www.amazon.com/Satin-Piping-Binding-Tape-Wide/dp/B07XXGLXQG?th=1

Here it is in five yard pieces. It's a little cheaper by the yard that way.

https://www.amazon.com/Satin-Piping...7XM4JFSM/ref=pd_lpo_1?pd_rd_i=B07XM4JFSM&th=1