Protocol for measuring percentage of coffee fines?

Protocol for measuring percentage of coffee fines?

10 Minutes With Helena Oliviero: Part One

We talk with coffee champion and Q Grader Helena Oliveriero about her career, her life in Colombia, and what it means to be a young woman in the male-dominated coffee world.   BY TANYA NANETTISENIOR ONLINE CORRESPONDENT Featured photo courtesy of Helena Oliviero Helena Oliviero, originally from Tuscany, Italy, is 28 years old, but already she […]


Serving Coffee in the Epicenter

The Turkish specialty-coffee community is coming together to support earthquake relief. BY MICHAEL BUTTERWORTHSPECIAL TO BARISTA MAGAZINE ONLINE When Niji Coffee went live on Instagram,…


A Look at Digital Coffee Future’s Digital Origin Education Program

The new program connects coffee producers to one another, provides them with educational resources, and more. BY VASILEIA FANARIOTISENIOR ONLINE CORRESPONDENT Photos courtesy of the Cocaerol, Comal & Amprocal cooperatives in Honduras Since 2021, Digital Coffee Future (DCF) has been working on a digital training program to address the needs of coffee producers. In September […]


Understanding the Process: Double Fermentation

Continuing our series on coffee processing, we learn about double fermentation, a term that can refer to several different processes. BY TANYA NANETTISENIOR ONLINE CORRESPONDENT Photos courtesy of Cafe Imports Editor’s note: Check out other entries in our “Understanding the Process“ series here. When exploring the wonderful world of high-quality coffee, you’ll discover that no […]

Protocol for measuring percentage of coffee fines?

Understanding the Process: Koji Fermentation

Continuing our series on coffee processing, we learn about koji fermentation, a unique process usually associated with the brewing of sake. BY TANYA NANETTISENIOR ONLINE CORRESPONDENT Photos courtesy of Forest Coffee If brewed properly, a cup of coffee can offer countless variations of flavor and aroma. The quality and complexity of these attributes depend on many different […]


The 2023 Specialty Coffee Transaction Guide Has Landed

The 2023 edition of the Specialty Coffee Transaction Guide (SCTG) guide went live today, providing actors throughout the coffee chain a data-driven tool for green coffee price discovery. The full…


The 2023 Specialty Coffee Transaction Guide Has Landed

The 2023 edition of the Specialty Coffee Transaction Guide (SCTG) guide went live today, providing actors throughout the coffee chain a data-driven tool for green coffee price discovery. The full…


Brewing at Home and On the Road with Darrin Daniel

We check in with the Cup of Excellence executive director to learn his current coffee-brewing habits. BY TANYA NANETTISENIOR ONLINE CORRESPONDENT Featured photo by Emre…

Protocol for measuring percentage of coffee fines?

The Potential of Augmented Reality Technology for the Coffee Industry

Join us as we explore the applications and trends of “augmented reality“ in the world of coffee. BY VASILEIA FANARIOTISENIOR ONLINE CORRESPONDENT Featured photo courtesy of Pixabay In the ever-evolving landscape of technology, augmented reality (AR) has emerged as a transformative force, blurring the lines between the digital and physical worlds. As we step into […]


5 Cool Cafés Worth a Try in Chiang Mai

Chiang Mai, one of Thailand’s most fascinating cities, is home to a vibrant specialty-coffee scene, with many cafés and roasteriess often offering locally grown coffee. BY TANYA NANETTI SENIOR ONLINE CORRESPONDENT Featured photo by Tim Durgan via Unsplash With a population of 3 million, Chiang Mai is a little (by Asian standards) gem in northern […]


Ethos Agriculture’s Journey from Vision to Impact in Coffee Sustainability: Part Two

In the second half of this article, we discover how the Coffee Barometer attempts to bridge the gap between discourse and action, envisioning a sustainable future for the coffee sector. BY VASILEIA FANARIOTISENIOR ONLINE CORRESPONDENT Featured photo courtesy of Rodrigo Flores via Unsplash As we embark on the second part of our conversation with Ethos […]


Interest in coffee & health is rising – what do consumers need to know?

There is a wealth of scientific research available about the many health benefits of coffee – as well as the undesirable side effects of drinking too much. But like all fields of science, research about the impact of drinking coffee on human health is ever-changing as we uncover new findings.  Interestingly, the continuous discovery of […]

Protocol for measuring percentage of coffee fines?

Protocol for measuring percentage of coffee fines?

minimum dose size?

Jan 31, 2024 |

I use the Hario switch to brew my coffee and am trying to reduce my caffeine consumption. Hence I would like to brew smaller cups of coffee. I am currently using 10g of coffee with 160g of water. (1:16 Ratio) I am wondering if there is a minimum amount of coffee...

Protocol for measuring percentage of coffee fines?

I'd like to compare the level of fines between my grinders and am wondering how to normalize grind level between them. Would the following protocol be accurate/useful enough?

  1. Dial in a shot of espresso so that each grinder produces the same shot time with the same amount of coffee (e.g. 30 sec, 10 gram in, 20 gram out).
  2. Grind the same amount of coffee at this grind level and transfer into a 250 micron sieve. Shake for a minute and measure the weight.
  3. Attach a battery-powered blower and a custom cap to the sieve (see comment below) in order to apply air pressure to blow out more fines. Measure the weight.

I tried this with a friend's Kingrinder K4, grind level set to 46 clicks. Here are the results:

Slowly cranking (about 80 RPM)

  • Initial ground coffee weight: 10.13 gram (includes RDT)
  • After 1 minute of shaking: 9.20 gram
  • After blower: 8.33 gram

Using an electric screwdriver (a few hundred RPMs)

  • Initial ground coffee weight: 10.08 gram (includes RDT)
  • After 1 minute of shaking: 7.86 gram
  • After blower: 6.51 gram

Do these results make sense? Would they be comparable to another grinder adjusted to produce the aforementioned 30 sec shot?

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Protocol for measuring percentage of coffee fines?

Perfect Little Beans

Chinmey Hill Coffee uses specialty-grade beans with zero primary defects (such as black beans or sour beans) and less than five secondary defects (such as broken beans). This is important because primary defects will greatly affect the taste of the coffee. Having zero defects allows the coffee to be the most optimal flavor.

Window for Optimal Flavor

Chimney Hill Coffee ships our coffee the same day it was roasted, so you will receive it before it enters the window of optimal flavor.  This means you’ll never miss the opportunity to enjoy the coffee’s peak flavor.

Coffee Ratings

Coffee undergoes many scoring processes by professionals who achieved their Q Grader certification. Coffee is first graded when it’s green. If there are defects the coffee is determined to be “not-specialty grade”. For those coffees that pass green grading, they are sample roasted and cupped. (Cupping is the official term for critically tasting and scoring coffees. The official cupping form is standard worldwide, and where the 100-point scoring system comes from.) A coffee’s dry fragrance, wet aroma, flavor, aftertaste, body, acidity, balance, and overall impression are taken into consideration while uniformity issues and defects, will lower the overall score.

Specialty Coffee

Specialty coffee, coined by Erna Knutsen in 1974, refers to a coffee that receives a quality grading score of 80 percent or higher. While “premium” or “gourmet” seem like they’re synonymous with “specialty,” they simply are marketing terms with no defined standards. Specialty coffees are grown in specific and ideal micro-climates, and have distinctive and unique flavor profiles, with little to no defects.

Third-Wave Coffee

We’re currently in the third wave of coffee. The first wave of American coffee put pre-ground, vacuum-sealed cans in kitchens across America. The second wave started with the late ‘60s introduction of Peet’s coffee (by Alfred Peet) through the proliferation of Starbucks. The third wave of coffee focuses on origin transparency, nuanced flavors, and artisan roasting. The term “third wave” is synonymous with specialty coffee.

Protocol for measuring percentage of coffee fines?

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