推荐回答（2个）
一：面粉加工厂机械加工，研磨出来的。
二：以前比较老早的是用驴拉磨的方式给研碎的，不过面粉和糠比较难分离。
三：就是磨坊用机械研碎了。面粉和糠料能较好的分离。
扩展资料：
1、小麦面粉按加工精度和用途不同分为等级粉和专用粉两大类：
（1）等级粉：根据加工精度的不同，可分为四类：特级一粉、特级二粉、标准粉和普通粉。
（2）专用粉：专用粉是由小麦专用品种磨制而成的面粉；或者根据使用目的的需要，在等级面粉的基础上，添加食品添加剂，使面粉混合均匀，制成面粉。专用粉种类繁多，配方精确，质量稳定。
2、小麦淀粉的制作：用水漂洗过后，把面粉里的粉筋与其他物质分离出来，粉筋成面筋，剩下的就是小麦淀粉。
现在都是买面粉。很少人去磨面了。
一：面粉加工厂机械加工，研磨出来的。
二：以前比较老早的是用驴拉磨的方式给研碎的，不过面粉和糠比较难分离。
三：就是磨坊用机械研碎了。面粉和糠料能较好的分离。
小麦在磨成面的时候，一定要小麦非常干燥，潮湿的小麦不仅难磨面，而且磨出来的面做馒头之类的话，待馒头熟了会很黑。我们现在看到的雪白的小麦面，基本上都被漂白过。想要见到未被漂白的面粉话，只能到较为偏远的地方去看原始的机械加工咯。
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