In order to maintain the freshness and color of red dates, the curves of drying temperature is adopted. The drying time of red dates is different according to different humidity, Take Xinjiang jujube as an example：
1st stage: 45℃-------1h, raising drying temperature, blow away 2nd stage: 48-52℃ ---- 2h, fully preheating red jujubeprepared for red jujube water out in the late stage.
Third stage: 54-58℃ ----------4h, the water is out from red jujube evenly, but rapid temperature rise is be prevented to ensure the plumpness of red dates,
Fourth stage: 60C ------0.5h, when the temperature rises, the sugar in the pulp of the red jujube is transformed to ensure the sweet taste
Fifth stage: 60-45C----1h, slow down temperature to prepare for cooling