Dough fermentation: how to match the time to your flour

You kneaded the dough, covered it with a cloth, and placed it near the radiator — "an hour, in a warm place," as the recipe says. It rose, you baked it, it looks good. Yet, the crumb is bland, and the next day, the bread is stale. The problem isn't your hand; it's the clock. Dough fermentation isn't a fixed hour in a recipe; it's a negotiation between flour, water, temperature, and time. When you learn to manage it, the same recipe yields a different crust, a different crumb, a different aroma.

Fermentation isn't just about volume

More than just swelling happens under the cloth. Enzymes in the flour break down starches into simple sugars, and yeast converts them into carbon dioxide — the bubbles that make the dough rise — but also into alcohol and organic acids, precisely the compounds that give flavor. In parallel, the gluten organizes itself: each bubble stretches the network, thins it, and layers it.

Volume is just the visible part. Rushed in a warm environment, fermentation produces a lot of gas and little aroma: risen bread, but without personality. With appropriate time and temperature, acids and esters accumulate, the crust browns more beautifully — sugars remain for caramelization — and the crumb gains a true bakery taste.

Each flour has its own clock: the Artos scale

This is where the W index comes in, the flour's strength measured with an alveograph. Simply put: W indicates how long the gluten network can hold bubbles without collapsing. A weak flour pushed too far collapses — the dough "loses its shoulders." A strong one removed too early remains tight and bland. As a guide, for our flours, milled at partner Italian mills:

• Stilistul 00 (W170, protein 10%) — 1–4 hours. Fine pastries, puff pastry, egg pasta, biscuits. Its delicate network doesn't withstand more than ~6 hours: don't use it for long fermentations and don't put it in pizza or bread.
• Clasicul 0S (W290, protein 12.5%) — 4–8 hours directly at room temperature, or 12–24 hours in the refrigerator. The most versatile: white bread, baguettes, focaccia, and, if needed, pizza.
• Statornicul 1 (type 1, W290, protein 13%) — the same strength as Clasicul, but with added fiber: everyday bread, rolls, rustic pizza.
• Maestrul 0R (W330, protein 13.5%) — maturation up to 24 hours: pizza flour. Long maturation gives the dough extensibility — it stretches thin without tearing.
• Paznicul 0RR (W370, protein 13.8%) — fermentations up to 48 hours and the realm of indirect methods, biga and poolish. Croissant, brioche, cozonac.
• Artizanul 0M (Manitoba, W400, min. 14% protein) — long maturation, minimum 48 hours. The marathoner: cozonac, panettone, croissant, babka. It also strengthens weaker flours in a mix — for example, Rădăcina 2, when you want rustic bread with long fermentation.

Rule of thumb: the higher the W, the more time the flour demands — and rewards. The reverse doesn't work: long time doesn't fix weak flour.

The refrigerator is the friend of flavor: cold fermentation

At 4–6 °C, yeast almost goes dormant: gas production drops dramatically. However, enzymes continue to work slowly, releasing sugars and flavor precursors. In the cold, you gain flavor without risking over-fermentation — the balance that is so hard to achieve in warmth.

Practically: knead in the evening, let the dough sit for 30–60 minutes at room temperature for fermentation to start, then cover it well and move it to the refrigerator. The next day — or in two days, if the flour allows — take it out, let it warm up, shape it, and give it its final proof. A significant bonus: the dough no longer waits for you; you decide when to put it in the oven.

The window depends on the flour: Clasicul stays comfortably for 12–24 hours in the cold, Maestrul handles pizza maturation for up to 24 hours, Paznicul goes up to 48, and Artizanul only starts to show its true nature after two days.

How much water the dough "drinks": hydration by type

Hydration is expressed in baker's percentages: grams of water per 100g of flour — 650g of water for 1kg of flour means 65%. As a guide:

• Pastries, puff pastry, biscuits: 50–60%. Firm dough, easy to roll and layer — Stilistul's territory.
• Everyday bread: 55–65%. The balance between an airy crumb and easy handling, with Clasicul or Statornicul.
• Pizza: 60–70%. Towards the upper end for long maturation with Maestrul — extra water keeps the crust tender during hot baking.
• Whole wheat: 65–75%. Bran "drinks" a lot and slowly — Naturalul IF (strong whole wheat, W340) requires more water than you'd expect, plus a rest to absorb it.

Two nuances: strong flours absorb more water than weak ones, so add it gradually, not all at once. And high hydration opens up the crumb but makes the dough sticky — increase it by 2–3% from one bake to the next, don't jump from 60 to 75.

How to read the dough: under- and over-fermentation

The clock is an estimate; the dough is the measuring instrument. Basic test: gently press with a floured finger, about one centimeter, and observe the mark.

• Under-fermented: the mark disappears immediately, like a spring. The dough is dense, tears when stretched, smells only of flour. Baked now, it yields a tight crumb and chaotically cracked crust. The solution is simple: give it more time.
• Correctly fermented: almost doubled, bulging, with fine bubbles on the surface; the mark slowly and only partially returns. It trembles slightly when you move the bowl — full of gas, but still strong.
• Over-fermented: the mark remains, the dough sags around it. It smells pungent, alcoholic, is sticky, and lacks tone. Baked, it comes out flat and pale — the sugars have been consumed, it has nothing left to color.

A dough pushed a little too far can still be saved: gently degas it, reshape it, and shorten the final proof — or spread it in a pan with olive oil and coarse salt, and you'll have a very respectable focaccia. Beyond a certain point, however, the gluten network is truly broken; note what happened and shorten it next time.

Where to start

Choose one change: make your usual bread with Clasicul 0S, but with 12 hours in the refrigerator instead of an hour in a warm place, at the hydration you already master. Compare the crust, crumb, and aroma the next day. Then move up the scale — Maestrul for pizza, Paznicul and Artizanul for rich leavened doughs. If you don't know which flour to start with, the quiz on the website will recommend one based on what you usually prepare, and the Artos family and flour collection show you the entire scale, with technical datasheets visible. Dough only asks for time — and time, to work for you, asks for the right flour.