The impact of science and technological advances as a motif in post-war design was eventually felt in the manufacture and marketing of coffee and coffee-makers. Consumer guides emphasized the ability of the device to meet standards of temperature and brewing time, and the ratio of soluble elements between brew and grounds. The industrial chemist Peter Schlumbohm expressed the scientific motif most purely in his "Chemex" coffeemaker, which from its initial marketing in the early 1940s used the authority of science as a sales tool, describing the product as "the Chemist's way of making coffee", and discussing at length the quality of its product in the language of the laboratory: "the funnel of the CHEMEX creates ideal hydrostatic conditions for the unique... Chemex extraction." Schlumbohm's unique brewer, a single Pyrex vessel shaped to hold a proprietary filter cone, resembled nothing more than a piece of laboratory equipment, and surprisingly became popular for a time in the otherwise heavily automated, technology-obsessed 1950s household.
A steam-driven unit operates by forcing water through the coffee by using steam or steam pressure. The first espresso machines were steam types, produced when a common boiler was piped to four group heads so that multiple types of coffee could be made at the same time. This design is still used today in lower-cost consumer machines, as it does not need to contain moving parts. Also, steam-driven machines do not produce as high of a pressure for extraction compared to pump-driven. This results in the crema, a hallmark of an espresso, being of lower quality.
Some machines use a single boiler kept at steaming temperature, but water for brewing is passed through a heat exchanger, taking some heat from the steam without rising to the same temperature. Although the water for brewing remains at a lower range than that required for steaming milk, it is still too hot for proper coffee extraction without first cooling; thus this type of machine requires a cooling flush of 4–6 seconds prior to the first espresso pull. Once the machine is dialed into the proper temperature, as many shots can be pulled as required without refreshing. However, if the user leaves the machine idle again for some period, the flushing process will need to be repeated. The HX variety is found in many mid-range machines and many users install thermometers to assist them is dialing in correct temperatures. There is some controversy as to the temperature stability of the brewing water, since it is indirectly converted from steaming temperature to brewing temperature, rather than kept at a brewing temperature.
Whip up a quick cup of coffee for your breakfast with the sleek and stylish Cuisinart Classic Percolator. A must-have countertop appliance, this percolator makes sure that your morning coffee rituals are refreshing and energetic. Featuring immaculate lines and a fine finesse, it has a classic design that looks great with most kitchen decors. The Classic Percolator from Cuisinart is made from stainless steel and lexan plastic for optimum sturdiness and durability. It has a silver finished body...
A portafilter (or group handle) attaches to the grouphead of semi-automatic and piston-driven espresso machines, and carries a tamped puck of coffee grounds within its basket. It is usually made of brass for better heat retention, and is attached by a plastic or wooden handle. The portafilter forms a seal with the espresso machine's gasket, and directs high-pressure hot water through the coffee puck. After-market retailers also sell bottomless portafilters that minimize the espresso's contact with any metal. A bottomless portafilter is one tool baristas use to analyze the quality of the coffee grind and the evenness of the extraction and allows for a visual check of "channeling" or the condition in which water is able to pierce a hole in the espresso puck during the brew process leading to poor extraction. Often, baristas use knockboxes to store their spent espresso grounds after they have pulled a shot.
There’s a coffee machine for everyone in our stylish and modern range: with pause-and-serve functions, 24-hour timers and larger carafes for up to fourteen cups, our coffee machines can be used in a variety of settings, from your kitchen counter to your office area. The water level indicator means you can choose exactly how many cups to brew, so there’s no need for anybody to go without, and nothing is wasted.
Our coffee machines are easy to use, and are designed with glass or thermal carafes and non-stick warming plates to keep your drip coffee warm long after the brewing process is over. Your coffee machine will alert you when it has finished brewing, and, depending on the model, will have either an automatic shut-off or a freshness indicator to ensure you never need to drink stale coffee again.
To find espresso machines that perfect the balance between simple design, customizable settings, and delicious espresso, we began by compiling a list of machines recommended by espresso-centric websites like Clive Coffee and Seattle Coffee Gear. We were selective about which brands we chose, skipping the popular Rancilio Silvia Espresso Machine after reading Home-Barista’s lukewarm review of it. We wanted machines that were both well-known and well-regarded. After looking at top sellers from Amazon and Bed Bath & Beyond, we also included the Mr. Coffee Cafe Barista. This addition drew the skepticism of the coffee experts we spoke with, but we couldn’t ignore its 1,700 Amazon reviews.
Making the perfect espresso can be a labor of love, but not everyone who wants to drink espresso wants to do all that labor. Pod-based machines make it easier, but then you have fewer type of coffee to choose from. This machine solves both of those problems since it has adapters for most of the popular pods, including Nespresso, Dolce Gusto, K-Fee, or Verismo by Starbucks, and you can also use your own fresh ground coffee.
The principle of a vacuum brewer was to heat water in a lower vessel until expansion forced the contents through a narrow tube into an upper vessel containing ground coffee. When the lower vessel was empty and sufficient brewing time had elapsed, the heat was removed and the resulting vacuum would draw the brewed coffee back through a strainer into the lower chamber, from which it could be decanted. The Bauhaus interpretation of this device can be seen in Gerhard Marcks' Sintrax coffee maker of 1925.
While it’s hands down the best cheap espresso machine on the market, Mr. Coffee isn’t on the same level with the Rocket or the Breville. Its shots lack the richness and complexity of true espresso, tasting more like a full-bodied Americano. Its layer of crema disappears quickly, and its shots don’t offer the gorgeous, gradient colors that you’d get from a machine like the Rocket. That said, it ranked fourth for taste among the machines we tested, so it’s still a solid option if you don’t need the finest coffee quality the market has to offer.
CR’s take: This unassuming, inexpensive Hamilton Beach coffee maker might be easy to miss, but it can brew a mean cup of joe at a fantastic price. In a basic black-plastic finish, it has the essentials—it’s programmable and offers auto-shutoff—and it offers solid brew performance in a decent time frame (10 minutes). Hamilton Beach machines even earned a Very Good rating for predicted reliability. At around $25, this simple model will get the job done.