Marius ComperFermentation Lab

Method and sources

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Sources and criteria

Methods and history

The comparison describes six preservation methods and marks whether each claim is historical, local or interpretive. Source codes point to the passages used. Individual accounts and recipes published online are examples, not evidence for a universal rule.

Safe home canning

Guidance on acidity, vinegar and salt comes from the National Center for Home Food Preservation (NCHFP), a USDA cooperative-extension program. It distinguishes quick vinegar pickling from brine fermentation and explains the limits of reduced-sodium salt.

Research on fermented pickles

A 2026 study by Xian and colleagues in Food Research International (vol. 233, article 118973; PMID 41956654) links brine changes and microbial succession with aroma. The abstract supports that broad conclusion; details about species and metabolites require the full article.

Why there is no universal ratio

The right proportion depends on the salt, ingredients, temperature, time and vessel. The calculator shows the brine concentration for the amounts you enter; it does not prescribe one recipe for every situation.

One recipe as an example

A recipe in one video uses about 20 g of coarse salt per litre. That is one author's example, not this page's recommendation or a rule verified for every ingredient. Watch the video.

Sources and credits

NCHFP guidance is paraphrased and linked to the original pages. The 2026 study is identified by DOI and PMID; this page uses only conclusions supported by its abstract.

Sources and the codes on this page

Each S-code on the main page leads to an entry with the source type, author or institution, date, relevant passage and a link when available. If the source leaves a detail unspecified, the entry says so.

S001

Romanian Ethnographic Atlas, Alimentația vol.: the Oltenia field records, the corpus's densest regional source.

source type: major corpus · field records · author/institution: Atlasul Etnografic Român, vol. Alimentația · date: fieldwork 1972–83 · passage: §3.2 · —

S002

Same AER volume: the locality responses (incl. the “before/now” vinegar-expansion memory).

source type: major corpus · field responses · author/institution: Atlasul Etnografic Român, vol. Alimentația · date: fieldwork 1972–83 · passage: §3.2 · —

S003

MNCR research: natural brine (murătoare/slatină) eaten in eastern Transylvania; the Lueta well locked and blessed.

source type: museum research · author/institution: Muzeul Național al Carpaților Răsăriteni · date: research 2003–05 · passage: §1.4+§5 · —

S004

The Chiojdu domestic-ferments study: three-phase succession. This site uses the corpus's secondary description; the primary text is unread.

source type: peer-reviewed study (secondary description) · author/institution: Wouters, Grosu-Tudor, Zamfir & De Vuyst · date: year/journal not recorded in corpus v1.0 · passage: §1.1+§13 · —

S005

The gogonele low-sodium trial (NaCl→KCl/MgCl2): this site records existence only, no figures.

source type: scientific study (existence only) · author/institution: authors not recorded in corpus v1.0 · date: not recorded · passage: §13.2 · —

S006

Maurer 1870: hot salted-vinegar cucumbers, cold salted-vinegar peppers; putinică and glass jar already attested.

source type: primary historical · printed cookbook · author/institution: Maria Maurer, ch. „Murături pentru iarnă” · date: 1870 ed. · passage: §1.2+§4 · —

S007

Iónnin 1865: pickles in wine vinegar (work title not in corpus).

source type: primary historical · author/institution: Christ Iónnin (work title not recorded) · date: 1865 · passage: §1.2+§4 · —

S008

The 1908 cookbook: brandy/mustard/sugar/spice hybrids (title not in corpus).

source type: primary historical · printed cookbook · author/institution: 1908 cookbook (title not recorded) · date: 1908 · passage: §1.3+§4.4 · —

S013

Law 312/2003 and norms: vinegar-acidified products / lactofermented vegetables / salted vegetables.

source type: official · law · author/institution: Legea 312/2003 + norms · date: 2003 · passage: §15 · —

S014

Giurgiu local source ~1800 (via Vintilă-Ghițulescu's research): peppers in vinegar, cucumbers in brine or dog-rose vinegar.

source type: local witness via historical research · author/institution: Giurgiu local source ~1800, citing Constanța Vintilă-Ghițulescu · date: ~1800 · passage: §3.1+§4.1 · —

S018

Source of the “moare” entry (pickle brine, esp. cabbage): the corpus names no dictionary.

source type: lexicography (work unidentified) · author/institution: not named in corpus v1.0 · date: not recorded · passage: §6 · —

S019

Regional lexicography: murătoare/morătoare (natural brine), slatină (works unnamed).

source type: regional lexicography · author/institution: regional dictionaries (works not named) · date: not recorded · passage: §3.4+§6 · —

S020

Source of the “a pritoci” entry (drawing off and pouring back): the corpus names no dictionary.

source type: lexicography (work unidentified) · author/institution: not named in corpus v1.0 · date: not recorded · passage: §6 · —

S021

Source of the “putină” record (stave vessel): the corpus names no work.

source type: material-culture record (work unidentified) · author/institution: not named in corpus v1.0 · date: not recorded · passage: §2.3+§8 · —

S022

The Prahova brine-spring continuities at pickles: source unnamed.

source type: local record (source unidentified) · author/institution: not named in corpus v1.0 · date: not recorded · passage: §3.1 · —

S023

Work on the traditional Bihor diet: sauerkraut as cheap/institutional fare since the 18th century (title not in corpus).

source type: food-history work (title unrecorded) · author/institution: work on traditional Bihor diet (title not recorded) · date: not recorded · passage: §3.5 · —

S024

The Rășinari ethnographic lead (“laptele de bou”, moare as base): source unnamed.

source type: ethnographic lead (source unidentified) · author/institution: Rășinari lead (source not named) · date: not recorded · passage: §6+food passages · —

S025

Ukrainian-community sources in Bukovina: pickles in holubți, soups, fasting meals. A community layer.

source type: community sources · author/institution: Ukrainian-community sources, Bukovina · date: not recorded · passage: §3.8 · —

S026

Regional literature on Banat: a multi-ethnic circulation zone, no ethnic attributions (works unnamed).

source type: regional literature · author/institution: regional literature on Banat (works not named) · date: not recorded · passage: §3.6 · —

S-NCHFP-PROC

NCHFP procedures page: the pH-4.6 line / uniform acid / 5% vinegar / ~1 week / fresh-pack≠fermented / weighing. Faithful paraphrase.

source type: extension-service guidance · author/institution: National Center for Home Food Preservation · date: fetched 2026-09-17 · passage: D3 · link ↗

S-NCHFP-SALT

NCHFP salt page: recommended / usable / quality-effect / ferment-caution on four distinct levels.

source type: extension-service guidance · author/institution: National Center for Home Food Preservation, after USDA Bull. 539 (2015) · date: fetched 2026-09-17 · passage: D4 · link ↗

S-XIAN-2026

The paocai successive-rounds study links brine reuse, microbial succession and flavor (GC×GC-MS and metatranscriptomics). This page uses only the abstract's conclusions; the authors report no conflicts of interest.

source type: peer-reviewed (abstract level only) · author/institution: Xian S et al., Food Res Int 233(Pt 2):118973 · date: 2026-06-01 · passage: D5 · link ↗

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