The process of wheat becomes flour -3
grinding
Now, grind the wheat into flour!
You don’t grind the wheat at one time. Grind it little by little.
By doing so, we can grind it from center to outside by degrees.
Use the roller grinder and a screen.
When the wheat pass through the grinder
and screen several times,
only the wheat’s peel will be left in the end.
First roller grinder(image)
First roller grinder
↓
screen――――――――――￢
（大きい粒） （powdered grainy）
↓ ↓
Second roller grinder to powder
↓
screen――――――――――￢
Third roller grinder(image)
↓ ↓
Third roller grinder to powder
↓
screen――――――――――￢
（large grainy） （powdered grainy）
↓ ↓
Forth roller grinder to powder
↓
Fifth roller grinder(image)
（large grainy） （powdered grainy）
↓ ↓
Fifth roller grinder to powder
↓
screen――――――――――￢
（large grainy） （powdered grainy）
↓ ↓
wastete to powder
The merit of taking the flour out separately is
being able to take out flours with different quality.
Even though the flour is made from same wheat,
the inside and outside of the wheat will become flour with very different quality.
Each flour has their own use. Some is good at one thing, and some is good at another.
This means by taking the flour out separately
leads to making flours suitable for the particular usage.