Autoclave first appeared in France in 1850, and originated in France. It consists of heat-resistant glass bottles (or transparent plastics) and metal filter screens with pressure rods. It was originally used to brew black tea, so some people called it a tea maker.
1852 In March, a horsepower goldsmith and a businessman obtained a patent called "piston coffee filter". This patent describes a metal can connected with a movable rod, which has a hole at the bottom and a layer of flannel at the top and bottom. After manually pulling the movable rod, the movable rod moves in the cylindrical container. "Press the lever to the end," the inventor wrote. "The filtered coffee stays above the lever, which is very refreshing."
It was not until the end of the 1920s that a company in Milan registered a patent for an improved autoclave, and the autoclave was gradually known. The company gradually improved the design of autoclave within a few years after registering the patent. 1935, they introduced an improved autoclave-a spring was installed on the disk structure at the bottom of the piston to keep the disk flush with the bottom of the container.
However, the popularization of autoclaves in the United States requires a lot of efforts. In the early 1980s, some Americans learned to use an autoclave in Britain, calling it cafetière, while others called it "French piston coffee machine". 1993, Florence? Fabricant introduced this "French pot pressing method" to readers in The New York Times, which claimed that the pot pressing is a favorite instrument for coffee connoisseurs.
Autoclave is a very good method to make coffee, which belongs to soaking extraction, similar to measuring cup. The essence of coffee is released by soaking in water and boiling coffee powder, which can better show the whole picture of beans, including flavor, defects and so on.
Its main advantages are simple operation, low technical requirements, affordable price, portability and strong practicability. The disadvantage is that the extraction is rough, the metal mesh can not completely filter the fine powder, and coffee grounds are easy to appear. Suitable for general office. If you have time for a good cup of coffee, you'd better do it by hand.
No matter what kind of extraction equipment has its own characteristics, the selection of extraction equipment should be comprehensively considered according to its own taste characteristics, economic conditions, use environment and other conditions. There is no distinction between high and low coffee utensils. What we are after is a good cup of coffee, not tableware. Just suit yourself ~