Research & journal

Notes from the bench

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

May 27, 2026

The Complete Guide to Origami Dripper Brewing: From Geometry to Perfect Extraction

Introduction The pursuit of optimal coffee extraction has driven the evolution of brewing methodologies from simple immersion to c…

May 21, 2026

The Origami Dripper Agitation Guide: Stirring, Swirling, and Pulse Pouring Techniques

Introduction The quest for repeatable, high-extraction, and uniform coffee brewing has driven significant innovation in pour-over…

May 21, 2026

Mastering Flat-Bottom Brewing with Origami: Kalita Wave Filters for Enhanced Sweetness

Introduction The pursuit of optimal sweetness extraction in specialty coffee brewing represents a fundamental objective within the…

May 19, 2026

How to Pre-Shape Kalita Wave 155 Filter Paper

Pre-shaping a Kalita Wave 155 filter paper is a small step done before rinsing. The goal is simple: help the wave ribs open evenly…

May 19, 2026

Kalita Wave 155 vs 185 Filter Geometry

The Kalita Wave 155 and Kalita Wave 185 share the same flat-bottom brewing idea, but their filter geometry behaves differently in…

May 19, 2026

Origami Dripper vs. V60: When to Choose Cone Filters for Maximum Clarity

<!DOCTYPE html> Origami Dripper vs. V60: Cone Filters for Maximum Clarity 1. Introduction The pursuit of clarity in brewed coffee…

May 12, 2026

The Origami Dripper Single Pour Technique: Maximizing Sweetness and Clarity

Introduction The pursuit of optimal extraction in pour-over coffee brewing represents a complex interplay of fluid dynamics, parti…