Raisins made of Sultanina grapes

Raisins are made of Sultanina grapes. Sultanina grapes are seedless grapes, coming from the lower vines of the vineyard. Sultana grapes owe their name to the sultan of Turkey.
The harvest is in August and September. The grapes are picked and put into baskets with little holes. These baskets are then dipped in a chemical bath.
Afterwards the grapes are hung out to sundry on the steel construction that you can see in the fields. This process of drying takes about 3 to 4 weeks. It is possible to assemble a plastic roof to the steel constructions against the rain, because when the grapes get wet during the drying process, the harvest is ruined.

During this process the grapes change colour from green to light brown and eventually they turn into dark brown. Then they will be shaken. In the factory they will be cleaned and once more dried. They are exported throughout Europe with the name: Sultanas.