Yes, it is possible with a sheet that contains colloidal silver and a goo that does the right thing. However, I forgot to add that you need a spreader for the surface of the print to tone it and get the proper tone and image stability.
Doing it in the light is a pain too. Without the proper backing on the paper and film, you have to do it in the darkroom. We used to do it that way with rollers and rails to get the gap and pull speed constant.