Start off by washing rice twice in water and soaking the rice for a minimum of one hour.
Drain the water from rice completely and spread out the rice as a thin layer on a cotton cloth or a newspaper.
Dry for 15 to 20 minutes in the shade(indoors). It should be almost dry but with a bit of moisture.
While rice is still mildly wet, transfer to a dry blender/grinder in small batches.
Grind for 3 to 4 minute till you get a super fine rice powder.
Add the rice powder to a fine sieve & sift it to get super fine rice flour. If you find small balls formed due to the moisture content in the rice, break and sieve it.
Sieve until you get residue rice rava (coarsely ground rice) and grind it along with the next batch of rice.
Use it directly right away if you are going to use it immediately to prepare any snacks.