Drip brew is a method for brewing coffee which involves pouring water over coffee contained in a filter. Water seeps through the coffee, absorbing its oils and essences, solely under gravity then passes through the bottom of the filter. The used coffee grounds are retained in the filter with the liquid falling (dripping) into a collecting vessel such as a carafe or pot.
Paper filters are commonly used for drip brew all over the world. One benefit of paper filters is that the used grounds and the filter may be disposed of together, without a need to clean the filter. However, metal filters are also common, especially in India. These are made of thin perforated metal sheets that restrain the grounds but allow the coffee to pass, thus eliminating the need to have to purchase separate filters which sometimes cannot be found in some parts of the world.
Drip brewing is the most popular method of coffee brewing, owing to the overwhelming popularity of the automatic drip brewing coffee machine. There are, however, several manual drip-brewing devices on the market, offering a little more control over brewing parameters than automatic machines. There also exist small, portable, single serving drip brew makers that only hold the paper filter and rest on top of a cup. Hot water is poured in and drips directly into the cup.
Brewing with a paper filter produces clear, light-bodied coffee, which is free of sediments, but lacking in some of coffee’s oils and essences, which are trapped in the paper filter.