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Food compass

Food compass

1What is vacuum freeze-dry?
 Water (H2O) has three different states, namaly solidliquid and gas. The three states can change and co-exist. When the vapor pressure is above 611 Pa., ice melts into water and water will change into vapor. When the temperature is 0.01 centigrade and the water pressure is 610.5 Pa(4.58mmHg),water, ice and vapor can co-exist and balance with each other. When the vapor pressure is below 611 Pa. ice can sublimate into vapor, making the matter become sponge whithout damaging its shape. This is basic theory of freeze-dry.

2What is freeze-dry food (FD food)?
FD food is made by quickly freeing dried in vacuum containers. In the vacuum, water will sublimate into vapor, making the dry food. This kind of food is good in color, fragrance, flavor and shape and keeping the vitamin and protein in the food. Before eating you can change it into the fresh food in a few minutes.

3What is the feature of FD food compared with other foods?
Water will become vapor if it receives enough heat, so do ice. The former is called evaporation and the latter is called sublimation. Air-dry is evaporation, Freeze-dry is sublimation, FD food is formed in the way of low temperature and vacuum, so that its shape, color and flavor remains undamaged. Also he nourishments remains the same. It can return to normal appearance easily. It has no restriction for kinds of foods. It can make vegetables, meat, milk, juice and so on into freeze-dry foods. It can also make fungi and pilose antler into FD medicine.