Why do coffee and milk run away and water just boils?
How to save milk
There are several ways to keep milk in a saucepan. The most tedious is to constantly stir: the polymer film is destroyed, the bubbles freely rise up and burst, releasing steam. But this is not our way. Instead, an inverted saucer can be placed on the bottom of the saucer with milk: the bubbles under it connect and rise up only when they reach a solid size. Large bubbles easily break the film and do not form foam.
The industrial analogue of a saucer is a milk watchman, invented back in 1921. A simple device is a metal disk 6–8 cm in diameter. It is covered with grooves under which bubbles collect, and is equipped with a spout (or just a hole) for steam release.
The third method, the most scientific, is a water bath. A container of milk is placed in a pot of water, it heats up smoothly and no higher than up to 100 ° C. The dissolved gas escapes without the formation of bubbles – and the milk does not escape anywhere.
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