Notes from the bench
Experiments, materials and measurements from the VIHI lab — 186 published notes and counting.

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 temperatur…

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 re…

A Complete Breakdown Of Random Variables In Pour Over Coffee 2...
Explore a complete breakdown of random variables in pour over coffee 2 with clearer structure, comparison sections, FAQ links, and…

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 mark…

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, Ori…

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…

Dripper Structural Engineering A Technical Whitepaper By Vihi...
Explore dripper structural engineering a technical whitepaper by vihi design with clearer structure, comparison sections, FAQ link…