Draft:Methods of coffee brewing
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There are numerous different methods of coffee brewing. They are commonly divided into two categories: immersion brewing and percolation brewing; however, there are methods that combine those as well. The first known method for brewing coffee was to have very-finely ground coffee mixed with boiling or near-boiling water. In the years since, many different methods for brewing have been devised.
Immersion brewing[edit]
Cafetière[edit]
The cafetière or the French press is a method of brewing coffee that involves having generally coarsely ground coffee placed in a container over which nearly-boiling or boiling temperature water is poured over the coffee. The mixture is left to infuse and after a period of time the piston filter is pressed down into the mixture to filter out the grounds.
Percolation brewing[edit]
Drip coffee machines[edit]
Drip coffee machines are one of the most commons methods of making percolated coffee. They have a basket in which ground coffee in a filter is placed. Then water is heated by the machine from the water reservoir, which then pours over the ground coffee.
Percolator[edit]
Percolators function by placing water in the bottom of the device and then inserting a metal filter held up by a rod in the same container. Ground coffee is placed on the filter and a spreader plate is placed on top of the ground coffee. The water is heated fro the bottom being forced via pressured through the rod onto the top of the round coffee and then the result filters down into the bottom of the chamber.
Coffee filter[edit]
A coffee filter is a filter used for various coffee brewing methods including but not limited to drip coffee filtering. Filters made of paper (disposable), cloth (reusable), or plastic, metal or porcelain (permanent) are used.[1] Paper and cloth filters require the use of some kind of filter holder, whereas filters made out of other materials may present an integral part of the holder or not, depending on construction. The filter allows the liquid coffee to flow through, but traps the coffee grounds.
References[edit]
- ^ Since filters and filter holders get in direct contact with hot water and coffee, an acidic solution, they should meet all criteria for food contact materials, which some materials, depending on local regulatories, may not. This holds particularly true for materials used in some older or historic filters. Metal alloys may contain problematic ingredients like lead (Pb), nickel (Ni) or chromium (Cr). Aluminium (Al) is suspected to cause Alzheimer disease. Various plastics may contain bisphenol A (BPA), bisphenol F (BPF), bisphenol S (BPS), phthalates, etc. Food-grade stainless steel and ceramics, and in particular silicate-based glass and porcelain are considered safe.