The processes for the manufacture of raw or heated dehulled solvent extracted flakes have been described in the previous sections (Chapter 3).
Usually, all the flakes made for edible products are flash-desolventized, then carefully steam-heated to the desired NSI value.
The final milling is critical and energy consuming. Although identity standards require milling to 97% minus 100-mesh, specialty flours (such as those used as milk solids replacement in infant formulae) are ground to a finer particle size.
At such levels of fineness, the conventional hammer mill is practically useless. Impact turbo mills or high-speed pin mills have to be used.