It is mainly used for appliqué as you can stick one piece of fabric onto another easily and then sew the raw edges and cut as per the design, peel the paper –the glue on the paper will transfer to fabric. Before applying, make sure your fabric is wrong side up and the interfacing is fusible side down.
How do you fuse paper to fabric?
https://www.youtube.com/watch?v=1mw42BqaRT8
What is glass fusing paper?
Decals for glass fusing are low fire and high fire and are fired on the top layer. ... ThinFire shelf paper is used to prevent glass from sticking to shelves and the kiln fire. Fiber paper is used as a shelf paper and in fiber relief designs.