Coffee grinding

Coffee ground with a blade grinder

Last Updated on February 27th, 2020 by Dorian BodnariucCoffee grinding is a critical step in the process of brewing coffee. Without grinding, the extraction of soluble solids, caffeine, and oils …

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Last Updated on February 28th, 2020 by Dorian BodnariucA portafilter (or group handle) attaches to the grouphead of semi-automatic and piston-driven espresso machines, and carries a tamped puck of coffee …

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Coffee percolator

Last Updated on September 4th, 2018 by Dorian BodnariucA coffee percolator is a type of pot used to brew coffee. The name stems from the word “percolate” which means to …

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Last Updated on July 17th, 2019 by Dorian BodnariucFrappuccino is a trademarked line of blended coffee beverages sold by Starbucks. It consists of coffee, blended with ice and other various …

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Last Updated on September 4th, 2018 by Dorian BodnariucTerroir is the set of special characteristics that the geography, geology and climate of a certain place, interacting with the plant’s genetics, …

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Coffee beans contain carbon dioxide immediately after roasting. The degassing starts right after roasting and is the process of seeping out the gasses from the beans. A lot of the CO2 leaves the beans in the first 24 hours after roasting, that is about 40%. Lighter roasts degass slower, whereas dark roasts degass faster. Gasses in the coffee beans is a sign of a freshly roasted coffee.

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Filtration is commonly the mechanical or physical operation which is used for the separation of solids from fluids (liquids or gases) by interposing a medium through which only the fluid can pass. Oversize solids in the fluid are retained, but the separation is not complete; solids will be contaminated with some fluid and filtrate will contain fine particles (depending on the pore size and filter thickness).

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Coffee filter

coffee filter

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A coffee filter is a utensil used during coffee brewing, for filtering coffee grounds from the brewed liquid. It is usually made of disposable paper with filaments approximately 20 micrometres wide. The fine paper screen only allows to pass through particles less than approximately 15 micrometres. This enables it to trap the coffee grounds that are bigger. The small water particles and the fines can flow through, resulting in clear coffee.

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Caffeine is a bitter, white crystalline xanthine alkaloid that acts as a stimulant drug. Caffeine is found in varying quantities in the seeds, leaves, and fruit of some plants, where it acts as a natural pesticide that paralyzes and kills certain insects feeding on the plants, as well as enhancing the reward memory of pollinators.

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Arabic coffee

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Arabic coffee is a general name that refers to the two main ways coffee is prepared in many Arab countries: Turkish-style, and Saudi Coffee. The Turkish coffee brewing method is common in the Levant, but brewed without the addition of sugar. Cardamom is often added, or it is served plain قهوة سادة qahwah sādah (lit. “plain coffee“).

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Last Updated on February 24th, 2018 by Dorian BodnariucA decanter is a vessel that is used to hold the decantation of a liquid which may contain sediment. Decanters are normally …

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Heat exchanger

Last Updated on September 4th, 2018 by Dorian BodnariucA heat exchanger is a piece of equipment built for efficient heat transfer from one medium to another. The media may be …

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Coffee culture

Last Updated on July 17th, 2019 by Dorian BodnariucCoffee culture describes a social atmosphere or series of associated social behaviors that depends heavily upon coffee, particularly as a social lubricant. …

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Last Updated on September 4th, 2018 by Dorian BodnariucA coffee cup is a container that coffee and espresso-based drinks are served in. Coffee cups are made of porcelain, ceramic, or tempered glass and they can have a handle for …


Temperature control

Last Updated on February 7th, 2020 by Dorian BodnariucTemperature control is a process in which change of temperature of a space (and objects collectively there within) is measured or otherwise …

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Last Updated on September 4th, 2018 by Dorian BodnariucPressure is the ratio of force to the area over which that force is distributed. Pressure is force per unit area applied …

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Last Updated on September 4th, 2018 by Dorian BodnariucFlavor or flavour is the sensory impression of a foods, drinks, or other substances, and is determined mainly by the chemical senses …

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PID controller

Last Updated on June 30th, 2019 by Dorian BodnariucIn coffee maker industry the PID improves the brewing precision, by allowing the brewing temperature to be maintained between certain parameters. What …

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Iced coffee

Last Updated on October 29th, 2018 by Dorian BodnariucIced coffee is a cold variant of coffee. In more recent times it has become common for coffee shops to offer ‘iced’ …

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