Although one normally expects the filtration times to be excessive for high-shear
milled API, in actuality wefind that filtration and drying times are often only slightly
longer and in many cases do not pose a significant issue. Some crystalline materials
will form crystalline bridges across the crystals during tray drying and may require a
delumping operation. It is recommended, therefore, that filtration and drying rates
and post-drying flow properties be evaluated in the laboratory prior to scale-up.
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