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What Causes Espresso Machine Leaks? Why Do Coffee Machines Drip During Espresso Extraction?
Recently, many friends have provided feedback to FrontStreet Coffee's backend: "Espresso machines often experience leaking during the extraction process." This issue is actually easy to resolve once we understand the underlying principles. Normally, during espresso extraction, water within a sealed space is only subjected to pressure from the coffee machine
2025-01-19 espresso machine leaks coffee machine dripping espresso extraction coffee equipment troubleshooting barista maintenance -
What Causes Uneven Flow Distribution When Extracting Espresso? What's the Difference Between Bottomless and Split-Flow Portafilters?
Before bottomless portafilters were invented, baristas primarily used portafilters with spouts when extracting espresso. These portafilters mainly come in two types: single-spout portafilters designed for single-shot baskets, and split-flow portafilters for double-shot baskets. The so-called split-flow portafilter refers to the type shown in the picture below, featuring
2025-06-07 espresso extraction uneven flow bottomless portafilter split-flow portafilter coffee brewing -
What Causes Pour-Over Coffee Blockage and Poor Water Flow? Why Shouldn't You Tap the Dripper? How Do Fine Particles Cause Coffee Over-Extraction?
Like FrontStreet Coffee, many friends develop a temporary "perfectionism" when brewing coffee! When they notice irregularities during the process, they always want to step in and "fix" them to make everything neat and tidy. For example, during the preparation steps before brewing coffee—wetting the filter paper! When the filter paper doesn't completely adhere to the dripper
2024-08-05 pour-over coffee coffee extraction coffee brewing coffee blockage fine coffee grounds -
SCA Arabica Coffee Green Bean Grading Manual_ How to Grade Arabica Coffee Beans?
Professional coffee knowledge exchange For more coffee bean information Please follow Coffee Workshop (WeChat public account cafe_style) [SCAA Specialty Coffee Green Bean Standards] SCAA green bean defects are divided into two major categories: Class I and Class II defects. The requirements for specialty coffee grade are: No Class I defects; No more than 5 Class II defects
2018-09-16 SCA Arabica coffee green beans grading manual coffee beans how to distinguish grades -
How to Fix Astringency in Pour-Over Coffee | Tutorial for Adjusting Coffee-to-Water Ratio, Temperature, and Time
Introduction Sour and astringent tastes are unpleasant sensations that most people dislike. When a cup of coffee has a sour and astringent quality, it creates discomfort. This barista training guide will explore the possible reasons why pour-over coffee develops astringency. Where does the astringent sensation come from? Strictly speaking, astringency is not a taste but a mouthfeel that manifests as
2021-11-14 pour-over coffee brew astringency how to solve causes what introduction -
Causes and Solutions for Green and Bitter Tastes in Pour-Over Coffee Brewing - Recommended Coffee Beans That Aren't Astringent
While coffee richness may not be immediately apparent, unpleasant sensations like sandy, rough astringency are easily detectable. Therefore, we need to understand and prevent such occurrences. As FrontStreet Coffee has mentioned in previous articles, astringency is not a taste but rather a mouthfeel
2022-02-27 pour-over coffee bitter taste green astringency coffee brewing coffee beans FrontStreet Coffee -
What Causes Thin Espresso Crema? Why Does Crema Have Many Large Bubbles? Factors That Make Espresso Taste Bad?
Recently, FrontStreet Coffee discovered while browsing that many friends encounter this situation when extracting espresso: "The extracted espresso has thin crema with many obvious large bubbles! The entire coffee tastes bland, has a thin mouthfeel, and the presence of bubbles affects the beauty of latte art patterns!
2024-06-03 espresso crema thin espresso bubbles espresso extraction problems coffee quality -
What are the signs of over-extracted coffee? Causes and solutions for over-extraction - Can coffee be brewed repeatedly?
Hmm, why is this coffee so bitter? Is it over-extracted? Many people think that bitter coffee is simply over-extracted...
2022-05-15 coffee over-extraction signs causes solutions taste repeatedly brewing -
What Causes Espresso Machine Explosions? Why Do Portafilters Blow Out During Extraction?
With the advent of affordable, compact home coffee machines, more and more people are equipping their homes with coffee machines to enjoy fresh, ground-to-order espresso anytime. However, what's increasing alongside the number of coffee machines is a series of operational issues. Recently, FrontStreet Coffee has noticed that online
2024-05-21 espresso machine safety portafilter explosion coffee extraction FrontStreet Coffee -
Hurricane Strikes Central American Coffee Regions Multiple Countries Experience Varying Degrees of Coffee Production Reduction!
For professional coffee knowledge exchange and more coffee bean information, please follow Coffee Workshop (WeChat official account: cafe_style). On November 3, 2020, Category 4 Hurricane ETA (later downgraded to a tropical storm) made landfall in Central America. This hurricane caused varying degrees of damage to regions in Nicaragua, Guatemala, Honduras, El Salvador, and Panama. Costa Rica, Mexico, and Jamaica were also
2021-01-28 hurricane strike Central America producing regions multiple countries coffee beans production varying degrees reduction -
What Causes Water Accumulation in the Portafilter Basket After Espresso Extraction and How to Solve It
A friend with an espresso machine asked FrontStreet Coffee, "I've been encountering an issue when extracting espresso recently. After extraction, when I remove the portafilter, I notice water accumulation in the basket, and the extracted coffee puck isn't intact—it's quite wet?" He then mentioned, "At first, I thought the coffee grounds were too fine, so I adjusted the grinder to a coarser setting, but still..."
2022-09-19 espresso machine portafilter water accumulation extraction problems coffee puck grind size -
What is Coffee Channeling? Why Does Espresso Experience Channeling? What Are the Causes and How to Solve It?
FrontStreet Coffee frequently mentions "channeling" in our articles because during the coffee extraction process, channeling negatively impacts coffee flavor. And it occurs quite frequently! So today, FrontStreet Coffee will share with you what channeling actually is and how to address it!
2024-09-03 coffee channeling espresso extraction coffee brewing problems coffee science barista techniques -
What Causes Clumping in Espresso Crema? Pay Attention to These Details When Extracting Espresso!
The "golden armor" of espresso--Crema, is a wonderful product unique to pressurized extraction. Its presence not only provides an excellent "canvas" for coffee latte art but also makes the coffee taste richer and fuller. Of course, as FrontStreet Coffee often says, this is on the premise that the crema quality is up to standard.
2024-06-10 espresso crema extraction troubleshooting coffee tips -
Why Does Coffee Taste Salty? What Causes Salty Flavor in Brewed Coffee? What Are the Signs of Under-Extracted Coffee?
Sour, sweet, and bitter are the three most common flavors we taste in a cup of coffee. Since these three flavors are crucial to the composition of coffee, many articles often focus on these tastes. However, coffee actually contains another hidden flavor beyond these three--saltiness. Coffee
2024-12-07 coffee taste salty coffee coffee extraction brewing methods coffee flavors -
What is a Coffee Powder Bed, and How to Raise the Powder Bed in Pour-Over Coffee: Causes of Under-Extraction
In FrontStreet Coffee's articles, you'll often find the term "raising the powder bed." Many readers wonder how to raise the powder bed and why it's necessary. In the final stages of pour-over coffee brewing, sometimes coffee grounds accumulate heavily in the center of the filter, sinking to the bottom and causing "flooding" in the brewing process.
2023-07-19 coffee powder bed pour-over coffee coffee extraction coffee brewing under-extraction FrontStreet Coffee -
What Causes Jagged Patterns in Latte Art? Solutions for Unclear Latte Art Designs
Some friends have asked FrontStreet Coffee for help, "Why is it suddenly difficult to pour clear latte art patterns recently, and why do the designs show obvious jagged edges?" Regarding this issue of "jagged patterns" in latte art, every barista who has ever poured latte art has likely experienced it. Many baristas feel at a loss when encountering this situation, often blaming it on their own poor performance
2022-09-03 latte art jagged patterns coffee techniques barista tips espresso art -
Why Does Pour-Over Coffee Have a Bitter Taste? Coffee Bean Roast Level and Brewing Techniques Causing Coffee's Astringency
Professional coffee knowledge exchange For more coffee bean information Please follow Coffee Workshop (WeChat official account cafe_style) Introduction Teacher Huanai Han once said: "Coffee oils and colloids create a smooth mouthfeel in the mouth, while coffee's polyphenol compounds produce a rough astringency, like having a devil's tail, running wild in the mouth, creating discomfort." If in wine
2021-06-01 why pour-over coffee astringency coffee beans roasting level technique causes -
Does Pour-Over Coffee Also Have Channeling Effects? What Causes Slow Water Flow and Water Pooling in Pour-Over Coffee?
For professional coffee knowledge exchange and more coffee bean information, please follow Coffee Workshop (WeChat public account: cafe_style). How do turbulence and agitation affect the flavor of pour-over coffee? Pour-over coffee is truly wonderful! You can watch the water flow elegantly during brewing, while well-brewed coffee becomes a crystal-clear liquid,
2023-01-05 pour-over coffee channeling effect slow water flow causes professional -
Severe Flooding in India Causes Significant Coffee Production Decline | India Coffee Growing | Quality of Indian Coffee
Professional coffee knowledge exchange For more coffee bean information Please follow Coffee Workshop (WeChat official account cafe_style ) Previous heavy rains triggered floods and mudslides, causing extensive damage to coffee tree plantations in India's southern coffee-producing regions, which may lead to India's coffee production in the next season dropping to its lowest level in 21 years. Southern India is the third largest coffee-producing region in Asia, and the state-owned Coffee Board had originally expected,
2018-08-29 India flooding severe coffee production decline cultivation quality professional knowledge -
Congo Coffee Growing Region News: Congo Volcanic Eruption Causes Evacuation of Coffee Growing Areas
For professional coffee knowledge exchange and more coffee bean information, please follow Coffee Workshop (WeChat public account: cafe_style). You might not be very familiar with the Democratic Republic of Congo as a coffee-producing country. Coffee from this origin has a rich body, exhibits characteristics of dark berries, with hints of citrus and spice. Unexpectedly, the Democratic Republic of Congo has recently become known to many due to this incident. On May 22nd, located...
2021-06-01 Congo coffee growing region news volcano eruption growing area people evacuation professional