What is the extraction rate of a flour mill?

This question often comes up in the world of milling: what is the extraction rate for stone-ground flour?

The Grain: A Complex Mix

Before discussing numbers, it's essential to understand the grain itself. A wheat grain consists of several layers. Broadly, there's the bran (13% to 18%), the germ (2%), and the floury endosperm. It's this latter part that interests us in making good stone-ground flour.

Extraction Rate: What is it?

The extraction rate is the percentage of flour obtained from the quantity of grain milled. With a stone flour mill, this figure varies depending on the method used. If the grain is ground without sieving, one can obtain up to 100% flour. However, it's during the sieving process that things get interesting.

The Art of Sieving: Refining for Better Extraction

Sieving is akin to filtering. The finer the sieve, the less flour is extracted.

During milling using sieves around 300 microns (0.3 mm), an extraction rate between 78% and 87% can be achieved, all in a single pass!

Variety of Grain: Each Grain is Unique

Not all grains are equal. The amount of floury endosperm can vary from one grain to another. A well-nourished and finely sieved grain will yield a higher extraction rate. Therefore, the quality of the raw material plays a crucial role in achieving an optimal extraction rate.

The Craft of the Miller: Key to Success

Beyond numbers and techniques, successful milling often depends on the expertise and craftsmanship of the miller. They understand their grains, master sieving, and adjust everything according to the raw material.

Come with your grain, feel the texture, and discuss the crafts of milling and baking. It's important for our team to exchange knowledge with you for the success of your project.

The Importance of Extraction Rate

Finally, the extraction rate of a stone mill is crucial for the quality of the flour. Understanding the grain, mastering sieving, and relying on the miller's expertise are key to obtaining quality flour. Milling is an art where science and passion meet for our culinary pleasure.

Are you ready to meet our team to discuss the topic of artisanal milling?