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All the Random Variables in Pour-Over Coffee: Why the Same Recipe Tastes Different
All the Random Variables in Pour-Over Coffee Many brewers experience this: Same recipe, same dripper, same grinder — different cup. This often leads to claims that pour-over coffee is “mysterious” or “unpredictable.” From an engineering perspective, these are not mysteries — they are unaccounted variables. What Are Random Variables? In pour-over coffee, random variables are
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Why Filter Paper Matters More Than You Think: Flow Rate, Extraction, and Consistency
Why Filter Paper Matters More Than You Think In pour-over coffee, most discussions focus on grinders, grind size, water temperature, and pouring technique. But one variable is often underestimated: filter paper. Filter paper is not “just a consumable.” It behaves like a precision engineering component inside the brewing system—shaping water flow, air exchange, fines migration,
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Why the Same Dripper Never Brews the Same Coffee: An Introduction to Dripper Structural Engineering
Why the Same Dripper Never Brews the Same Coffee In pour-over coffee, one question keeps coming back: Why is it so difficult to reproduce the same cup, even with the same dripper and recipe? The common explanations often include: Inconsistent pouring technique Minor differences in water flow “Off days” From an engineering perspective, these explanations
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A Complete Breakdown of Random Variables in Pour-Over Coffee
A Complete Breakdown of Random Variables in Pour-Over Coffee Why do people call pour-over coffee “unpredictable”? Why can V60, Origami, or Kalita Wave produce completely different results with the same beans and recipe? The truth is simple: Pour-over coffee has too many invisible variables. At Vihi, we turn these unknowns into measurable engineering structures. 01｜Filter
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Vihi & The 4R Framework: A Systemic Sustainability Strategy from Material Science to Circular Economy
Vihi & The 4R Framework: A Systemic Sustainability Strategy from Material Science to Circular Economy Sustainability is not a marketing claim. In environmental engineering, sustainability is a systemic equilibrium between materials, energy, product functions, and their ecological consequences. As a design studio specializing in coffee tools and 3D-printed engineering structures, Vihi embeds the 4R principles
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A Complete Breakdown of Random Variables in Pour-Over Coffee
A Complete Breakdown of Random Variables in Pour-Over Coffee Why do people call pour-over coffee “unpredictable”? Why can V60, Origami, or Kalita Wave produce completely different results with the same beans and recipe? The truth is simple: Pour-over coffee has too many invisible variables. At Vihi, we turn these unknowns into measurable engineering structures. 01｜Filter
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Turning Mystery into Engineering: How Vihi Redefines Pour-Over Coffee
Turning Mystery into Engineering: How Vihi Redefines Pour-Over Coffee In many parts of the coffee community, pour-over brewing is often described as “unpredictable.” Same beans, same steps — different results. But in engineering, unpredictability simply means a variable that has not yet been measured. At Vihi, our mission is clear: We turn what once felt
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Dripper Structural Engineering: A Technical Whitepaper by Vihi Design
Dripper Structural Engineering: A Technical Whitepaper Vihi Design Coffee Research Lab ｜ Technical Whitepaper 2025 Preface: Why Dripper Geometry Matters More Than We Think A dripper is not simply a “holder for paper.” From an engineering perspective, it is a micro-scale fluid dynamics device. Its geometry determines: Flow rate Bed stability Pressure distribution Flow pathway
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How 3D Printing Is Rewriting the Future of Coffee Tools: The Engineering Revolution by Vihi Design
How 3D Printing Is Rewriting the Future of Coffee Tools: The Engineering Revolution by Vihi Design The next five years of coffee innovation will not be defined by factories, but by engineering-driven 3D-printing studios. Why 3D Printing, and Why Now? For two decades, coffee tools have evolved slowly. Drippers changed shapes, paper changed textures, but