The malting process takes up 1 week with hot air malt drying, and considerably longer with solar drying. There is a loss in dry matter of approximately 10% through grain respiration and substantially higher if the malt roots and shoots removed.
Low plumpness and high protein mostly are attributable to high temperatures and moisture stress during grain filling. These factors are of concern to maltsters and brewers for a number of reasons, according to Paul Schwarz, IBMS director.