I have been experimenting with what I could print with the Ghost white toner in my laser printer for the last couple of years. I have been trying to get a transfer for the inside of saloon windows to simulate the frosting/etching of such asa shown in this photo..
I don't know why it took so long to think about printing on laser transparency film I used to use years ago for overhead projectors. I found some and tried printing some designs from 2018.