The locals use broken rice since it is cheaper and start by soaking in water for one day to soften it. The rice is then ground up.
The ground rice is mixed with the tapioca starch with approximately an even amount of each to make it more flexible.
Here is a traditional mixer which is used.
Once mixed, you get a white batter.
The paste is heated over a large skillet much like cooking pancakes.
The heated mixture hardens and can be removed.
It is then placed on a rack to get it ready for drying.
This video highlights how this is done.
It is then placed out in the sun to dry for approximately 8 hours ( depending on weather)
The rice paper is then placed in a cutting machine to create the noodles. The machine can be set to cut different thicknesses.
Here is a photo showing some leftovers.
The rice noodles can be used to to make soups or "pho".