Abstract: A humidifying device has a plate stack with channel plates stacked in stacking direction in the plate stack. The channel plates have a longitudinal axis perpendicular to the stacking direction. One or more channel plates have a first and a second channel partial plate arranged on each other in stacking direction, and each provided with a circumferentially extending frame and stays arranged between oppositely positioned sides of the frame. The stays are slanted to the longitudinal axis. The stays of the first and second channel partial plates cross each other, viewed in the stacking direction. Semipermeable layers separate a first group of flow channels and a second group of flow channels from each other in the plate stack. Flow channels of the first group alternate with flow channels of the second group in the stacking direction. The first or second group of flow channels extends along the longitudinal axis.

Abstract: The present invention concerns a process for preparing a dried soluble culinary foamer powder. The process includes the steps of preparing a concentrated culinary solution to provide a concentrated solution having a solids concentration above about 50% by weight; foaming the concentrated solution to an overrun of at least about 200% for providing a foamed solution; drying the foamed solution, preferably in a convection dryer, at atmospheric pressure and for a time that is sufficiently rapid to provide a dried foamed product, and comminuting the dried foamed product to soluble culinary foamer powder. The soluble culinary foamer powder is particular suitable in preparation of culinary products based on dry base powder such as dry sauce or sauce base which is brought to boiling when being prepared.