Dry extracts often cause difficulties in their processing. Can it be remedied?

A dry extract is hygroscopic, does not slip well and takes up moisture when stored. A solution can be found by adding custom quantity of the Excipi ë NS with following composition: Microcrystalline Cellulose (Avicel PH 101 or 102) 65%; Dried starch 15%; Silicon dioxide Coll. 2.5%; Talk 17.5%.