Water vapour composites manufacturing

The vapourization of the solvent (including v/ater). A dough which contains glutinous rice starch and is charged into a tube, shrinks slowly as it dries and creates a gap especially if it is in a metal tube, even when the tube is less than 3 in internal diameter. During the manufacture of small pieces like igniters this is important. It is a common rule to decrease the amount of solvent in a composition as far as possible. When the composition feels to be rather wet, it contains 2 3% solvent or water. A composition like this is most unlikely to shrink, when it is formed into a mass under high pressure. 

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