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COULD DRYING SYSTEM
Valverbe
produces its herbal teas paying attention to the whole process,
from the seed to the final product. In fact desiccation involves significant chemical and physical alterations of the plant tissue and the drying process stabilizes them blocking the enzymatic degradation processes affecting plants right after cutting. Our cooperative has invested a lot on this stage: we are the only ones in Italy using a licensed CFT® technology for cold drying. Our system, unlike traditional hot desiccation, preserves intact the cell membrane and with it all the properties of plants. This technique reproduces inside the drying chamber the conditions of evening breeze, that is to say that moment of the day when for the physical-botanical laws governing the vegetable kingdom there is an exchange between the aerial part and the roots of the plant thanks to the opening of cellular stomas (mouths) that have remained closed until that moment in order to protect themselves from heat.
The system we use has been programmed in order to desiccate about 8 quintals of fresh plants in 48 hours. Freshly-cut plants are put in a hermetically closed steel canister in which a rush of fresh and dry air is blown. This triggers off in few minutes the opening of the cellular mouth and the outflow of water from the tissues. In 2006 Valverbe made a panel test on two samples of herbs dried in the two different ways and at the same time a comparison between the active ingredients of the two samples. DIAGRAM OF THE PROCESS Traditional hot drying:
A)
Drying begins: the cell membrane is intact. Cold drying:
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