The English translation for "挂耳咖啡" is "instant coffee ". Instant coffee , also known as soluble coffee, is a popular beverage that offers convenience and quick preparation. In this article, we will explore the history of instant coffee, its production process, and its popularity worldwide.

Instant coffee has a fascinating history that dates back to the late 18th century. The first attempts to create an instant form of coffee were made by various inventors around the world. However, it was not until 1901 when Japanese-American chemist Satori Kato successfully invented a method to produce stable and soluble powdered coffee.

The production process of instant coffee involves several steps. First, high-quality beans are selected and roasted to perfection. Then they are ground into fine particles before being brewed into regular liquid coffee. The liquid extract undergoes two main processes: freeze-drying or spray-drying.

In freeze-drying method, the brewed liquid is frozen at extremely low temperatures and then placed in a vacuum chamber where it turns directly from solid ice into vapor without going through the liquid phase. This results in ***all granules that easily dissolve in hot water when prepared for consumption.

In spray-drying method, hot air is used to evaporate most of the water content from the brewed liquid extract while it falls through a tall drying tower as fine droplets or mist-like particles. By doing so, larger granules are formed which can be dissolved quickly when mixed with hot water.

Instant coffee has gained immense popularity worldwide due to its convenience and ease of preparation compared to traditional brewing methods such as using drip machines or French presses. It allows people on-the-go or those with limited time access to their favorite beverage within seconds.

Besides convenience factor，instant coffees have also improved significantly in terms of taste over time，with many brands offering a wide range of flavors and options to suit different preferences. Additionally, instant coffee is often used as an ingredient in various recipes, such as desserts or baking good s.

In conclusion, instant coffee has come a long way since its invention in the early 20th century. With its quick preparation time and improved taste, it has become a popular choice for coffee lovers around the world. Whether you prefer freeze-dried or spray-dried granules, instant coffee offers convenience without compromising on flavor.