This is an intriguing looking option for etch stencils.. Check out the Dura-Film process here, which uses a UV light to expose a film that washes away in developer. I can't tell if the stencil disappears completely or if it leaves a mesh in the open spaces like the Riso film.
The biggest downside is the extreme cost of the stencil sheets, several dollars per 8"x10" sheet. 🙁