Solar box cooker dehydration of culinary leaves: Leaf morphometrics and relative humidity endpoint detection

Open solar dehydration has been used traditionally to remove moisture from culinary leaves in order to preserve their medicinal and nutritional qualities. This paper investigates the performance of a converted family-size (27 L) solar box cooker for solar dehydration of culinary leaves (Bay, Sweet, and Greek Basil and Common Sage). The investigation was carried out over the three month period from May to July 2025, on the island of Crete. The chosen leaves vary in their in vivo water content and