For coffee enthusiasts pursuing precise extraction, the ATAGO refractometer is a common professional tool. This article focuses on three coffee refractometers under the brand—4523, 4532, and 4533—sorting out their differences and purchasing advice, and addresses questions about accuracy comparisons with the VST LAB. Then, using the 4532 TDS model as an example, it explains step by step the practical essentials such as the unboxing checklist, battery installation, zero calibration, concentration measurement, and extraction yield calculation. The article also particularly reminds readers of easily overlooked details such as zeroing frequency, sample temperature, and cleaning taboos. If you are currently using or considering purchasing an ATAGO refractometer, this guide will help you avoid common pitfalls and make every measurement more reliable. Front Street Coffee also emphasizes the standardized use of such instruments in daily quality control. [more…]

The Golden Cup extraction system is a quality reference framework widely recognized in the global coffee industry, and its core lies in controlling the concentration and extraction yield of the coffee liquid within a specific range. Compiled by FrontStreet Coffee, this article systematically reviews the origins of the Golden Cup standard and the differences in national standards, explains in detail the formulas for extraction yield and concentration, and uses a VST refractometer and a brewing example with Ethiopia Huakui 4.0 to demonstrate how to measure concentration and calculate extraction yield. At the same time, the article also discusses the influence of the pour-over coffee grounds-to-water ratio on flavor, gives a recommended ratio of 1:15 suitable for most bean varieties, and helps coffee enthusiasts build a quantifiable approach to brewing adjustments. [more…]

In coffee brewing, how to balance flavor and avoid under-extraction or over-extraction is a concern for every coffee enthusiast. The Golden Cup standard provides a widely recognized reference framework, covering the ideal ranges for extraction yield and concentration. This article will systematically review the origins of the Golden Cup standard and the specific values set by coffee associations in various countries, explain in detail the formulas for calculating concentration and extraction yield, and, using the example of Front Street Coffee's Ethiopia Florque 4.0 pour-over, demonstrate how to measure and calculate extraction yield with an ExtractMoJo refractometer, helping you find the flavor balance point that suits you in your daily brewing. [more…]

As the "legendary machine" in the specialty coffee world, the Mahlkonig EK43 has long since risen from a single-origin grinder to a standard fixture in espresso cafés, thanks to its outstanding grind uniformity and extraction performance. From early experiments at Café Myriade in Montreal in 2009 to Matt Perger's endorsement on the world competition stage in 2013, the EK43 was gradually elevated to iconic status. Meanwhile, Ditting, another "high-end grinder," is often compared with the EK43, with each having its own strengths in burr layout and flavor profile. This article reviews the grind settings and structural differences among the EK43 series versions (EK43S, EK43T, EK43, EKK43), traces its rise to fame, and compares the design features of Ditting's horizontal flat burrs. Combined with Matt Perger's particle experiment data, it analyzes why the EK43 can achieve more uniform extraction. Front Street Coffee will also share related product recommendations in this article. [more…]

Coffee extraction is the key step that determines flavor. About 30% of coffee beans consists of soluble substances, including both aromatic components and mouthfeel-related compounds, and a higher extraction yield does not necessarily mean better quality. This article systematically introduces concentration measurement methods (refractometer, conductivity pen, evaporation and drying), explains the extraction yield conversion formula in detail, and provides specific calculation steps for different brewing devices such as immersion, pour-over, and espresso. It also includes the golden cup concentration recommendations from the SCAA and SCAE, as well as relevant product information from the Front Street Coffee brand, to help enthusiasts understand extraction more scientifically. [more…]

How expensive can a cup of pour-over coffee get? The Brew Lab Cafe in Penrith, in Sydney's western suburbs, has given a jaw-dropping answer: 1,500 Australian dollars, equivalent to nearly 7,000 yuan, and it must be booked two weeks in advance. This coffee uses a single-origin bean from Batch #22324 produced by Ninety Plus, grown at the foot of the Silla De Pando volcano in Panama at an altitude of about 1,700 meters, with a cupping score of over 90 points and flavors encompassing peach, strawberry, lemonade, rose, and juniper. Owner Mitchell Johnson defines it as an experience, and revealed that some customers were moved to tears after tasting it. At the same time, the shop also offers specialty single-origin coffees priced between 100 and 200 Australian dollars for enthusiasts with limited budgets. [more…]

In 2021, Coca-Cola carried out a new round of visual packaging upgrades for its product line, with Coca-Cola, Diet Coke, and Coke Zero all receiving more minimalist new looks. This redesign continues the "One Brand" strategy introduced in 2015. The most noticeable change is that the logo has been moved upward, and the classic ribbon element has been removed, giving the overall style a clean and crisp feel. In terms of color schemes, the classic version retains the red-and-white combination, the Diet version adopts red and silver, and the Zero version forms a high-contrast look with a black logo against a red background. At the same time, at the end of last year Coca-Cola also launched an eco-friendly paper bottle prototype called "Adez," jointly developed by its Brussels lab and the Danish company Paboco. It uses a paper shell with a plastic liner and a recyclable plastic cap, further conveying the concept of sustainable development. This article will compare the old and new packaging changes in detail and review these two noteworthy developments. [more…]

Those seemingly casual artistic expressions in coffee shops—tattoos, latte art, a laid-back atmosphere—are actually underpinned by a rigorous set of scientific rules. When baristas have to face the test of producing hundreds of cups every day, consistency becomes the key to whether customers will come back again. This article, from a professional perspective, systematically sorts out seven practical principles for maintaining coffee quality consistency: from valuing the filter basket model and recommended dose, treating the scale as a core tool, to establishing reusable brewing recipes, dealing with the natural variations of blend beans, to facing the reality that pour-over coffee is hard to keep stable, valuing the impact of water quality on flavor, and relying on teamwork to achieve consistently stable output. These rules may seem dull, but they are the cornerstone that makes every cup of coffee trustworthy. [more…]

Front Street Coffee's Blue Mountain coffee has long presented a classic balanced flavor through wet processing. Since 2019, it has begun exploring natural processing, and in 2020, it first exported small batches of natural Blue Mountain. This article systematically compares two Blue Mountain No. 1 coffees from Jamaica's Clifton Farm—natural and washed—from brewing techniques to flavor performance. Clifton Farm has an average elevation of 1,310 meters, a cultivation history dating back to the mid-eighteenth century, and is the only coffee farm in Jamaica certified by the Rainforest Alliance. The article will document brewing parameters and techniques in detail, and separately describe the aroma, acidity, sweetness, body, and aftertaste of the two coffees, helping coffee enthusiasts understand the specific flavor differences between natural Blue Mountain and washed Blue Mountain, while also providing brewing suggestions for natural Blue Mountain. [more…]

Want to make a good cup of coffee at home? Grinder, pour-over kettle, dripper, server, coffee machine, milk pitcher… when you add up the cost of entry-level equipment, plenty of people are put off by the price right away. Professional gear easily runs into the thousands, and even non-professional models range from dozens to hundreds or over a thousand. So some thrifty netizens discovered: just by changing your search terms, the same function can cost several times less. Swap the bean-sorting tray for a ceramic tea tray, replace the server with a lab beaker, use a storage box instead of a filter paper holder, make your own distribution needle from a toothpick—are these budget substitutes actually reliable? Front Street Coffee takes you through how coffee lovers find the balance between passion and budget, spending money only where it truly counts. [more…]

Summer is here, and many people enjoy making cold brew coffee at home, but the filtration step often proves troublesome—the coffee liquid drips extremely slowly, sometimes taking half a day. Why is cold brew filtration so slow? The core reason is that the extremely fine particles in the coffee grounds clog the pores of the filter paper, leaving insufficient channels for the liquid to flow through. This is especially true when making multiple servings at once, as the waiting time gets stretched even further. This article will first explain the causes of clogging, then share three methods commonly used by baristas to speed up filtration: using a filter bag or cloth to pre-isolate the coffee grounds, spreading the coffee grounds at the bottom of the filter paper to intercept fine particles, and using a vacuum filtration device to achieve rapid filtration under reduced pressure. Each approach has its own pros and cons, suiting enthusiasts with different needs, and the article also retains relevant experience and product recommendations from the Front Street Coffee brand. [more…]

Guming teamed up with Pan Hu Design Lab to launch a Spring Festival limited-edition "Fortune and Prosperity in Motion" themed packaging. One of the designs, a takeaway cup featuring a rotating interactive element, attracted considerable consumer interest thanks to its novel concept — some customers even placed orders specifically to collect the cup. However, many customers discovered upon receiving the actual product that the snake pattern on the cup body was hard to make out, and rotating the cup to the left as instructed produced no movement at all — a far cry from the dynamic effect advertised by the brand. Guming staff later explained that the rotating effect requires a special cup sleeve to work, and that this sleeve needs to be assembled. Due to the heavy order volume during the Spring Festival, some stores overlooked including it, which significantly undermined the customer experience. The incident sparked widespread discussion online, with some arguing that the promotional materials failed to clearly indicate the importance of the cup sleeve, while others pointed out that stores should ensure all accessories are complete before serving orders. [more…]

September has arrived, yet the heat in the south shows no sign of fading, and a refreshing glass of iced coffee remains a favorite for many coffee lovers. Step into Front Street Coffee, and the apparatus on the bar that looks like a chemistry lab setup always sparks curiosity—this is exactly the equipment for making cold brew drip coffee. Cold brew drip coffee originated in the Netherlands, using ice water for low-temperature slow extraction. Although it takes a long time, it delivers a smooth, full-bodied taste with a subtle fermented aroma. In this article, Front Street will systematically explain the extraction principles of cold brew drip coffee, its differences from hot extraction, key production points, and share suitable coffee bean choices and specific blending schemes for cold brew drip, helping you make an outstanding cup of cold brew drip coffee at home. [more…]

Geisha is a highly sought-after coffee variety in the coffee world today, and the Geisha produced in Panama is the benchmark among them. On Front Street Coffee's bean list, there is a rich selection of Panamanian Geisha, among which 90+ Eleta Geisha stands out. Many people wonder: is 90+ actually an estate? Where in Panama is it located? What makes this Geisha so unique? This article will focus on the origins of the 90+ company, the terroir conditions of the Volcan region, the Profile Processing system, and the flavor performance of the two Geishas currently sold by Front Street, Juliette and Eleta, to give you a comprehensive understanding of the story behind 90+ Eleta Geisha. [more…]

There is a wide variety of coffee brewing equipment, and the moka pot and the siphon are two choices with distinctly different styles. The moka pot, with its simple operation and rich flavor, has become a frequent choice for beginners, while the siphon attracts enthusiasts with its laboratory-like ritual and clean, balanced flavor. What are the differences between the two in terms of extraction principles, pressure methods, and final taste? Starting from the practices at Front Street Coffee, this article provides a detailed overview of the structure, usage methods, and flavor performance of the moka pot and the siphon, helping you find the cup that suits you at home. [more…]

When ordering at a coffee shop, you usually buy by the cup, but a store in Chengdu has turned tradition on its head — Auncel Coffee, which sells coffee beans by the gram. Customers pick their own beans, have them weighed, and then a conveyor-belt assembly line handles grinding and brewing. This small shop near Tianfu Square in Jinjiang District, with its minimalist black-and-white style and an L-shaped laboratory-like long bar, has drawn plenty of coffee lovers looking to check in. Bean prices range from 0.28 yuan to 1.88 yuan per gram, and a cup of coffee ends up costing anywhere from a few yuan to thirty or forty yuan. Whether this model can gain a foothold in the fiercely competitive coffee market is worth watching. [more…]

These days, walking into any beverage shop, the variety on the menu is always dazzling. Boba shops are selling porridge, cafes surprisingly offer lemon tea, and industry competition has long entered a white-hot stage. More noteworthy is that the boundary between coffee and milk tea is being continuously broken: oats, fermented rice, thick milk, and osmanthus are all being added to coffee, the traditional bitter taste is weakened, and the flavor is moving closer to milk tea. A science blogger on Weibo once organized a blind test, asking participants to distinguish between coffee and milk tea with similar flavors, and surprisingly nearly half of the people could not accurately tell them apart. Coffee's localization and youth-oriented strategies, the migration of childhood milk tea memories, and various novelty pairings have jointly driven this trend. This article takes you to explore the phenomenon of coffee becoming more like milk tea and the logic behind it. [more…]

Recently, a customer picking up an order at a Luckin Coffee store was stunned by the dozen or so bottles of concentrated fruit juice lined up on the counter, as if they had stumbled into a chemistry lab. These colorful ingredients are the mainstay of Luckin's new products over the past two months, and they have also left baristas complaining endlessly—shaking endless shaker cups and weighing endless ingredients, making them joke that they feel more like milk tea shop staff. In an August new product plan leaked in advance by employees, a light milk tea called "Gentle Jasmine" once again sparked heated discussion, with some joking that it is the "Luckin version of Boya Juexian." Interestingly, Luckin actually launched a sub-brand called "Little Deer Tea" in its early years. Is it now going to return to the milk tea track? This article will take you to find out. [more…]

Recently, Heytea publicly recruited tea preparers at a job fair in Guangzhou, and the education requirement column conspicuously stated "bachelor's degree," sparking widespread discussion on social media platforms. An applicant revealed that the requirement was initially "associate degree," but was later changed to "bachelor's degree" with a sticker. Many netizens questioned: does shaking milk tea require a bachelor's degree? In response, a Heytea store stated that the tea preparer position places more emphasis on individual ability, education is not a hard threshold, and promotions are not based on education. After the incident gained traction, the education requirement on the recruitment notice was changed back to "no requirement." This recruitment controversy reflects the sensitive topic of the match between education and job positions in the current job market, and also prompts people to reconsider: where exactly is the professional threshold behind a cup of milk tea? [more…]

Panama, this narrow isthmus connecting North and South America, with its unique microclimates and volcanic soil, has given birth to the world-famous Geisha coffee. From the introduction of Typica in 1780 to Hacienda La Esmeralda's stunning breakthrough in 2004, how did Geisha rise from a windbreak hedge to the pinnacle of fame? What is the difference between green-tip and bronze-tip? This article takes you through the historical trajectory of Panama Geisha, decoding the terroir secrets of core producing regions such as Boquete and Volcán Barú, and reviewing the cultivation characteristics and grading systems of renowned estates like Hacienda La Esmeralda, Elida, and Hartmann, offering a comprehensive presentation of Geisha coffee's legendary charm. [more…]