Raw Materials
Start with the fermentable source, then follow how preparation changes what reaches yeast.
Book a session
Proof & Principle Spirits Library
Every spirit.
In context.
A growing reference system for the world of distilled spirits, built to connect category, law, raw material, production and sensory character.
Spirit categories overlap by raw material, geography and regulation. The library organizes each tradition according to the production and legal structure that explains it most clearly.
How clear spirits are classified: Technical classification begins with raw material, production method, geography and law. Vodka, gin, unaged rum, Tequila Blanco, shōchū and fruit eaux-de-vie may all appear clear while belonging to distinct traditions. Proof & Principle groups each one by production logic and legal identity.
Answer first
What is a distilled spirit?
A distilled spirit is an alcoholic beverage produced by distilling a fermented material. Raw material and preparation establish what can be fermented; fermentation creates alcohol and flavour-active compounds; distillation concentrates and selects volatile fractions; maturation, blending, dilution, filtration and flavouring may then shape the final category and style.
01
Fermentation
How yeast converts fermentable sugar and creates compounds that can influence spirit style.
Open foundation →02Distillation
How volatility, reflux, copper contact and fraction selection shape the new spirit.
Open foundation →03Pot vs Column
Compare architecture, operating mode and collection without treating still type as a flavour verdict.
Open comparison →04Maturation
How spirit, vessel, wood history and environment interact during storage.
Open foundation →Explore by spirit
Begin with the category.
Choose the spirit family first. Each live hub explains the category, places its traditions in context and connects the established guides beneath it.
01
Live hub
Whisk(e)y
Scotch, Irish, American, Canadian, Japanese and world whisky, plus malt, grain, blending, maturation and label logic.
Explore category ↗
02
Live hub
Cane Spirits
Rum, rhum agricole, cachaça, clairin and regional cane traditions, organized by material, fermentation, still design and law.
Explore category ↗
03
Live hub
Grape & Wine Spirits
Cognac, Armagnac, pisco and other wine distillates, with pomace spirits separated where production logic changes.
Explore category ↗
04
Live hub
Fruit Spirits & Eaux-de-vie
Calvados, apple and pear brandies, kirsch, slivovitz, poire Williams and other fruit distillates.
Explore category ↗
05
Live hub
Agave & Mexican Traditions
Tequila is live now, with mezcal, raicilla, bacanora, sotol and related Mexican traditions in the roadmap.
Explore category ↗
06
Live hub
Vodka & Neutral Spirits
Neutral spirit, vodka, rectification, filtration, base materials, legal definitions and the idea of neutrality itself.
Explore category ↗
07
Live hub
Gin, Genever & Botanicals
Genever, gin, juniper, botanical extraction, distillation, law, styles and sensory analysis mapped as one connected subject.
Explore the library →
08
Building
Asian & Fermentation-led Traditions
Baijiu, shōchū, awamori, soju, arrack and traditions where fermentation systems require their own vocabulary.
Planned library hub
09
Building
Pomace & Specialty Distillates
Grappa, marc, orujo and other distillates defined by pomace, by-products or distinctive regional methods.
Planned library hub
10
Building
Liqueurs, Bitters & Compounded Spirits
Sweetened, flavoured and compounded categories including liqueurs, amari, bitters and related traditions.
Planned library hubExplore by concept
Follow the principle across categories.
Production concepts do not belong to one spirit alone. These live entry points let you compare how the same decision changes across whisky, cane spirits, agave and neutral spirit.
Fermentation
Follow sugar conversion, yeast behaviour and the formation of flavour-active compounds.
Distillation
Compare batch and continuous routes, separation, reflux, copper contact and collection strength.
Maturation
Read wood, previous use, heat treatment, climate, evaporation, time and cask management together.
Blending
See how components are selected, combined, married and adjusted into a deliberate house style.
Water & Dilution
Separate production water, proof reduction and the sensory effect of adding water in the glass.
Law & Labels
Begin with regulated identity, then interpret age, origin, strength and producer language.
Tasting & Sensory
Describe the glass first. Use verified production evidence to test the explanation afterwards.
How production becomes flavour.
Every category changes the details, but the teaching sequence stays stable. Follow the material from its source to the glass, and ask what each decision preserved, removed, created or transformed.
01Raw material
02Fermentation
03Distillation
04Maturation
05Blending
06Dilution
07Glass
Each category becomes a complete learning system.
Vertical depth
Each spirit family can branch into law, raw materials, fermentation, distillation, maturation, blending, labelling, service and sensory analysis. Together, these branches build the depth of a structured academy.
Horizontal connection
The same cross-category foundations will also connect horizontally. A reader learning reflux, neutral spirit, new oak, congeners or dilution will be able to move between categories and see how the same principle changes in different production systems.
About the knowledge
Proof before conclusion. Principle before shortcut.
Independent spirits education built from regulation, technical references, producer evidence and practical hospitality experience. Each guide is designed to stand alone, while its links show where the subject sits inside the wider system.
Written and researched by Rabei Zaitouna. Legal and technical claims are checked against the strongest available source for the subject, with references kept at the end of each guide.
About Rabei and Proof & Principle →Current learning paths
Enter through a connected hub.
The Whisk(e)y Library now connects Scotch, Irish, Bourbon, American Rye & Corn and Canadian Whisky. The other live category hubs keep their established guides in context as the network grows.