Raisins going bust, wash. Raisins better to buy one that is sold by weight and not in bags.
Washed raisins put in a teapot and pour boiling water. Sugar is not necessary to add-see the following photo.
And here is the sugar - if you look closely, then the photo shows the stains or waves inside the kettle - it dissolves the sugar and is seen thicker than water syrup. For reference: in the raisins of glucose and fructose (natural sugar) more than in grapes up to 8 times. At the same time in some grape varieties the sugar content reaches 20%.
Of the shortcomings - a long wait for brew - at least 30 min. Doctors recommend raisins as a remedy against anemia and General weakness, fever and disorders of the gastrointestinal tract, heart and kidney diseases, as well as colds!