Crispy dried strawberries, How are their shape and color preserved?

To obtain crispy dried strawberries while retaining their original shape and color, the most suitable drying method for strawberries and other fruits with high sugar and water content is freeze-drying. In this article, Mactech analyzes the characteristics of the fruits and the most suitable and effective drying machines.

Strawberries and similar fruits are characterized by their high sugar and water content, soft texture, low fiber content, and high starch content, making drying them difficult to achieve an aesthetically pleasing product. While many types of dried strawberries are available on the market, currently in Vietnam, dried strawberries often have an unattractive shape, shrinkage, darker color compared to their natural state, and a chewier texture. Therefore, high-quality dried fruit products remain a promising area for producers specializing in dried fruit. Crispy dried strawberries, crispy dried mangoes, crispy dried kiwis, crispy dried durian, crispy dried dragon fruit, crispy dried watermelon… all these products have beautiful shapes, attractive colors, and retain their nutritional value when freeze-dried.

The ideal dryer for soft, watery, sugary, and powdery fruits is the freeze dryer (also known as a freeze-dryer). The drying process typically involves three main stages: first, rapid freezing at temperatures between -30°C and -40°C, depending on the machine; second, vacuuming the drying chamber to achieve the required pressure below 30 Pa; and third, continuous drying. In this stage, the product temperature (the temperature of the drying trays) is gradually raised to specific levels over a defined period. The final temperature at the end of the drying process usually reaches 30°C to make the product crispier, more thoroughly dried, and with a firmer texture.

Not only are dried strawberries crispy and finely powdered, crumbling easily when squeezed, but other products from fruits, vegetables, meat, fish, and food, as well as liquids and herbal extracts, when freeze-dried, also produce porous, lightweight products that retain their shape and color. They crumble easily when gently squeezed, making them ideal for producing nutritional powders. Thus, through the basic information above, readers have a better understanding of which freeze-drying machine is most effective for producing crispy dried fruits with the most beautiful shape and natural color. Customers are encouraged to contact Mactech directly for more advice. We hope this information provides valuable knowledge to our readers.