Burn out Devore technique chemical lace
A technique for creating embossed, engraved, or lace effects on fabric. Usually done useing fabric of completely different fibers, for example silk-rayon, polycotton and etc., it is a chemical process wherein a chemical that will destroy one of the fibers without harming the other is applied to the fabric following the desired pattern, heated to activate the reaction, and then washed. When the fabric is washed, the remaining chemical and the residue of one fiber are rinsed away, leaving the other fiber intact. Generally it is cellulose fiber that is dissolved, and a protien or synthetic fiber that is unaffected.
This method has been employed for nearly 150 years in the commercial manufacture of "chemical lace". It is also quite popular for replicating cut velvet patterns on velevets, velveteens, and plush.
I have personally marveled at some DIY webpages that detail how to do burn out with nothing but heat. People taking things like coat hanger wire and branding synthetic velvets to get a burn out effect, and yet they don't wind up with a molten glob or a hole in the fabric.