Rice milling is a process of removing the husk and the bran layers, and produce an edible, white rice kernel that is sufficiently milled and free of impurities.Most rice varieties are composed of roughly 20% rice hull or husk, 11% bran layers, and 69% starchy endosperm, also referred to as the total milled rice.

Paddy rice: also called rough rice. It is dried to 18% moisture and consists the hull, bran and kernel.
Brown rice: also known as husked rice. It is the least processed form of rice with the husk removed. The bran layer gives the characteristic tan colour.
Milled rice: Commonly called white rice. This is the final milling by rice milling machine https://www.victorricemill.com.
Head rice: Milled rice with length greater or equal to three quarters of the average length of the whole kernel. It is often expressed on a % paddy or rough rice basis (on 14% Moisture content basis)
Broken rice:Ungrade rice after processing ,not going to the market.

Rice Milling Systems
Automatic rice mill plant https://www.victorricemill.com/product/automatic-rice-mill-plant-sale can be a simple one or two step process, or a multi stage process.
In a one step milling process, husk and bran removal are done in one pass and milled or white rice is produced directly out of paddy.
In a two step process, removing husk and removing bran are done separately, and brown rice is produced as an intermediate product.
In multistage milling, rice will undergo a number of different processing steps.

Depending on whether the the paddy is milled in the village for local consumption or for the marketing, rice milling systems can be classified into two categories: village rice mill and commercial mill.

Village rice mill: Village-type rice mills can be found in rural communities and are used for service milling paddy of farmers for home consumption,it's normall small rice milling machine https://www.victorricemill.com/product/home-use-rice-milling-machine with small capacity .
Commercial rice mill: The objectives of commercial rice milling are to produce edible rice that appeals to the customer. Rice that is sufficiently milled and free of husks, stones, and other non-grain materials and maximize the total milled rice recovery out of paddy and minimize grain breakage.those processed rice can appear on the market.

Nice thread