Formore demandingcorecastingssometimesbrushthe paste.In this case,the technological processrequiresdrying ofthe core.Todaythe corecan bedriedin several ways:
Classicaltunnelinggasorelectrically heateddryers
Microwavedryers
Microwave drying is the most frequently in use.It isenergy efficientbecauseonlyheatsthe material,it is fast,no need topreheat theovenandwhat isalsoimportant,sometissuewhile dryingfurtherstrengthened.