![]() You take a kitchen towel, a turban, in short a rag that you soak in water, you surround your water bottle or your can (plastic, glass, aluminum, it works for everything) with this piece of wet cloth. It is very simple and it takes about fifteen minutes in direct sunlight to cool a liquid that is at room temperature (often hot). One of them requires a very strong heat and very little humidity: I used this technique in African deserts. ![]() ![]() There are also other solutions to refresh the water. Waterreserved in jars, for the palace cooks to prepare sorbets, particularly by supercooling (a very particular physical principle). Once the operation was over, the provisions were also placed at the bottom of these constructions, in holes specially prepared for this purpose. The principle of operation is simple: in winter, caravans set out to extract blocks of ice in glaciers from the high mountains, then brought them back for storage at the lowest point of the yakhtchals. JC, the Persians used constructions called yakhchals to cool food and liquids. ![]() These constructions were relatively large: the visible part was approximately 20 meters high, for a total volume of 5,000 m³. One of the techniques to store the icecream It comes from Persia (now Iran). How can you make ice cream or even cold without a freezer or fridge? The Question of the day: “I learned with great surprise that sherbets already existed under Louis XIV. ![]() This article is published in collaboration with Quoraa platform where Internet users can ask questions and where others, specialists in the field, answer them. ![]()
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