It is recommended that back raisins the prepared graves that dry fruit be placed out in a single layer on the baking sheets. It is ideal to place a piece of parchment paper, a silicone mat, or aluminum foil beneath the black raisins to avoid getting liquid all over the plates. After washing, if the raw material is still damp, you should dry it using a towel or a piece of paper towel. How to roast black raisins until they are fully dry Start preheating the oven in the meantime. Temperature must not surpass sixty degrees. In addition, the mode that utilizes forced air or convection is advised whenever possible, given that the technical parameters of the oven permit it.
As a direct consequence of this, the rate of evaporation quickens, and the length of time necessary for drying reduces. It is recommended practice to leave the lid open after setting the baking sheet inside the oven. This allows the steam to evaporate and avoids the product from becoming too hot. Dries 2-3 days. Having said that, it is not necessary for the oven to run nonstop. Turning off the heat periodically, removing the baking sheets, allowing the product to completely cool down, stirring it, and drying it once more are all important steps to take to ensure that the berries dry out evenly and maintain the highest possible quantity of healthy components. Due to the fact that the berries typically vary in both size and the amount of moisture they contain, it is necessary to frequently re-read the product and remove the finished berries; otherwise, the berries will become dry. In addition to this, the baking sheets need to be turned over so that the black raisins can dry in an even manner. In order for the black raisins to acquire the ideal temperature at the end of the cooking procedure, the temperature of the oven should be adjusted to between 35 and 40 degrees. Next, remove the raisins, wait until they have reached their former temperature, and then put them in containers for storage.
In an electric dryer With an electric dehydrator, you can significantly reduce the cooking time of raisins. With this method, the process takes 8-12 hours. Dryers are easy to use and can dry larger amounts of food than ovens. Prepared berries should be laid out in a row on racks arranged in layers, and the temperature should be brought to a maximum of 60 degrees. If the drying chamber is of the convection type and the air enters the shelves from the bottom up, the bottom layer dries faster than the top layer. To ensure an even drying process, diapers should therefore be changed every hour. Also turn off the machine every 3 hours and refrigerate the ingredients for 2 hours and dry again. Repeat this process every 3 hours. If your dryer doesn't have a thermostat that shuts it down if it overheats, you can stop the process overnight and restart it in the morning. To ensure even drying of the black raisins, they should be sorted before stacking them on the shelves. It is better if the size of the berries is at the same level. You can also sort the berries as they dry, separating those that are already cooked. Don't forget to stir. The speed and quality of the process depends not only on the variety and size of the berries, but also on the type of dryer. More powerful devices significantly reduce operating time. 
But they have a fundamental drawback. Their voices are very strong. Electric dryers are also divided into convection and infrared. The second method is more efficient and faster because infrared rays penetrate deep into the product and absorb moisture. Displacement devices only dry the moisture from the surface, which significantly delays the process. This is especially true for black raisins. During the drying process, a thick layer of wax forms on the skin, which prevents the active release of moisture from the product. There are also devices that draw air from the bottom up. This is a feature of cheaper models. There are also more expensive electric dryers that distribute air evenly across all surfaces. In this case, the product dries faster and it is not necessary to change the tray. Quality and speed are also affected by the materials used in the construction of the device. Although metal dryers are more expensive than plastic dryers, they lose efficiency because the necessary heat is extracted from the black raisins when the metal is heated.
The advantage of electric dryers is not only in their speed and ease of use. They allow you to save on many useful substances in fruit juices. in the microwave This drying method is perhaps one of the fastest. This will take only few minutes. But there is a fundamental problem. A plate placed in the cooking compartment is not suitable
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