Abstract: The present invention relates to a method for preparation of a vegetable material, wherein a living plant is treated with a cytokinin prior to harvest. The invention also relates to a method for preparation of food products, as well as food products comprising the vegetable material. The advantage of the method is that the vegetable material remains green longer during storage of the food product.

Abstract: Proposed is a method for manufacturing a package out of foil, with a heating process for heating a foil section, as well as a packaging machine (1) for manufacturing a package out of foil, with a heating device (14) for heating a foil section (3?) and with a device (17) for generating negative pressures on each of the two sides of the foil section. In order to allow improved coordination of individual manufacturing steps, it is proposed that in a same time interval during the heating process, a negative pressure relative to the ambient pressure is generated on both sides of the foil section (3?) during the heating process.