Wine-making instruments

Whether it is traditional barrel fermentation, the so-called oxidative process, or the so-called reductive technology using metal tanks, excellent quality wine can only be made from grape pressing to bottling with great care, handling, and living together with the grape nectar. Wine is the oldest alcoholic beverage. In the past, must was extracted from the grapes by treading, but today modern equipment and tools are available for crushing, pressing, fermentation, clarification, bottling, and corking.

In this category, among others, hydrometers, airlocks, measuring jugs, fermentation tanks, demijohns, filters, filling equipment, and various accessories are available. These tools ensure the controlled, hygienic, and predictable course of winemaking processes, without which stable, long-lived, clear wine cannot be made.

What is the difference between reductive and oxidative winemaking technology?

The goal of reductive technology is to preserve freshness, while the goal of oxidative technology is to increase depth and complexity. Both are valuable and professionally justified – only the winemaking style and grape variety determine which is the better solution.

The technological processes of winemaking fundamentally determine the aroma structure, stability, and aging potential of the finished wine. These technologies differ in the degree of the wine’s contact with oxygen and result in completely different styles of wine.

Reductive winemaking – freshness, aromatic richness

The central principle of reductive technology is the exclusion of oxygen from processing and fermentation. Its aim is to maximally preserve fresh, fruity aromas and to make primeur wines.

Controlled fermentation takes place in stainless (inox) steel tanks, where a cooling jacket ensures a temperature between 12–18 °C and the exclusion of oxygen, using carbon dioxide (CO₂) and nitrogen in a closed system.

Reductive wines are characterized by a light color, intense aroma, clean, fresh, fruity (citrus, floral, elderflower) aromas, and lively acidity.

There is a low risk of microbiological contamination in the closed system.

Reductive wines should be consumed relatively soon, they cannot be stored for a long time.
Typical grape varieties for reductive wines: Irsai Olivér, Sauvignon Blanc, Cserszegi fűszeres, Pinot Noir rosé.

Although most red wines are traditionally made in a more oxidative style (see later), more and more wineries are making reductive style red wines as lighter, fruitier trends are more fashionable. Light, fruity young wines can be made from Kadarka, Zweigelt, Kékfrankos, Kékoportó (Portugieser), and Pinot Noir varieties.
These wines are typically consumed within a year.

Oxidative winemaking – the path of traditional aging

Oxidative winemaking technology typically takes place in the presence of oxygen, under controlled conditions (micro-oxidation). Its aim is to highlight the wine’s complex, deep, aged character. For this, wooden barrels are used, typically made of oak. Fermentation occurs at higher temperatures, 18-24 °C, and the aging processes proceed more slowly.

Oxidative (barrel-aged) wines are characterized by deeper, more distinctive aromas, fuller body, and creamy texture. The flavors of walnut, caramel, and dried fruit can be detected in the wine. The tannins from the wooden barrel also add a lot to the flavors. Their color is quite dark; white wines are golden and deep amber, while red wines are almost black.

Oxidative wines can be well aged in the bottle and kept for a long time. Their production requires precise professional supervision. Typical white wines: Tokaji szamorodni, sherry, barrel-aged chardonnay, olaszrizling, juhfark. Classic barrel-aged red wines: Cabernet Sauvignon, Merlot, Cabernet Franc, Kékfrankos (with barrel aging), Bikavér (Szekszárd, Eger), Shiraz (Syrah), Pinot Noir, Zweigelt.

What winemaking tools and auxiliaries can be used in reductive and oxidative winemaking?

For every phase of winemaking – whether reductive or oxidative technology – the use of appropriate winemaking tools and auxiliaries is essential.
The range at gazdabolt.hu has been compiled so that both beginner and professional winemakers can find the products necessary for professional work.

The main goal of reductive technology is to preserve fresh, fruity aromas, for which an oxygen-poor environment and carefully selected winemaking auxiliaries are indispensable. For this, various yeasts, nutrients, and aroma-releasing enzymes are essential, which form the basis of modern controlled fermentation. The gazdabolt.hu range includes several special yeast strains and enzymes, such as the aroma-releasing enzyme, which specifically enhances the aroma and flavor of reductive white wines.

For the stability and freshness of reductive wines, protection provided by appropriate antioxidants is also indispensable. Sulfur dioxide (wine sulfur) plays an important role in this, being one of the most commonly used winemaking materials. Wine sulfur helps protect the must and wine from oxidation and ensures microbiological stability. Gazdabolt.hu offers wine sulfur in several packaging sizes, thus meeting the needs of both small family cellars and winemakers working with larger quantities.

Reductive technology requires great precision, so accurate measurements and regulation are often necessary. For this, hydrometers (must hydrometers, mash hydrometers), measuring cylinders, and measuring jugs offer reliable solutions.
For both reductive and oxidative wines, the clarity and stability of the wine are key. For clarification operations, gazdabolt.hu offers a wide range of bentonite, which is ideal for protein stabilization, as well as various clarification kits that offer complex, professional solutions for cleaning 100–1000 liters of wine. The use of bentonite is especially important for reductive wines, as clear, transparent appearance and shelf life are prerequisites for the stability of white and rosé wines. In oxidative technology, pre-clarification before long barrel aging helps avoid later clarification difficulties and stability problems.

Both winemaking processes may require acid regulation, which can be most naturally achieved with tartaric acid. Tartaric acid improves the wine’s acid structure, refreshes its taste, and also makes the environment less favorable for unwanted organisms from a microbiological point of view. The tartaric acid available at gazdabolt.hu is of excellent quality, food-grade purity, and can be safely used for must and wine.

During wine fermentation, an airlock is indispensable, which releases the carbon dioxide produced from the must but prevents oxygen or contamination from entering the tank. The glass and plastic airlocks from gazdabolt.hu are reliable tools for both reductive and oxidative processes. To determine the quality of the must and mash, hydrometers are also needed: must hydrometers show the sugar content of the grapes, while mash hydrometers help determine the expected alcohol content of fruit mashes. These are essential tools for quality winemaking.

In oxidative technology, storage vessels play an increased role, especially wooden barrels and larger capacity floating-lid tanks, as well as inox cans. The stainless steel tanks, paraffin floating-lid tanks, and wooden stand horizontal tanks from gazdabolt.hu are all excellent alternatives for controlled oxidative aging. Glass demijohns are perfect for fermenting or aging smaller quantities, whether white, rosé, or red wine.

Among winemaking auxiliaries, filtration and wine cleaning also play an important role. Glycerin, ascorbic acid, activated carbon, color-extracting agents, pectin-breaking enzymes, and yeast nutrients all contribute to the stability and aromatic richness of the wine. In the reductive style, aroma protection and stability are most important, so the use of antioxidants and enzymes is most common. In oxidative technology, the focus is more on developing body, deeper aromas, and preparing for longer aging, for which stabilization and microbiological control are also essential.

In summary:

The winemaking range at gazdabolt.hu fully supports both reductive and oxidative technology: from grape processing, through fermentation, to stabilization and storage, all important products can be found.

Those who want to make trendy, fruity wines will find the most important antioxidants, enzymes, and steel tanks. Those who prefer the traditional, more aged style can get everything from large capacity tanks to professional clarifying agents.

Frequently Asked Questions (FAQ)

1. How should a must hydrometer be used correctly?

The must hydrometer should be immersed in clean, 20 °C must so that it floats freely on the surface of the liquid. The must degree (°MM) can be read from the scale on its stem. For accurate measurement, the sample should be filtered so that skin and seed pieces do not distort the result.

2. What does the must degree indicate and why is it important to know?

The must degree indicates the sugar content of the must. The higher it is, the higher the expected alcohol content will be. Based on the must degree, it can be decided whether sugar needs to be added and how fermentation can be controlled.

3. What is a mash hydrometer for?

The mash hydrometer is used to determine the sugar content of fruit mashes (plum, apple, pear, etc.). Based on the sugar content in the mash, the expected alcohol content can be calculated and fermentation optimized.

4. Why is an airlock needed during fermentation?

The airlock releases the carbon dioxide produced but does not let oxygen back in. This prevents oxidation, wine turning to vinegar, and bacteria entering the fermentation vessel.

5. Should I use a glass or plastic airlock?

Both are workable solutions. The glass airlock is more durable and easier to clean. The plastic airlock is lighter, cheaper, and less fragile.

6. When should sulfur dioxide be added to the must?

Sulfur dioxide is usually added after pressing, before fermentation, to kill harmful microorganisms and prevent oxidation. The amount must be determined precisely by measurement.

7. What does bentonite do in wine?

Bentonite is a natural mineral that binds and precipitates proteins, resulting in a clearer, more stable wine. It is used for clarification and protein stabilization.

8. Which yeast should I choose for red and white wine?

For white wine: yeast strains that highlight fresh aromas.

For red wine: yeasts that help color extraction and structure.
Yeast strains can differ by variety and style.

9. What is yeast nutrient for?

It helps the yeast function healthily, so fermentation proceeds faster and more reliably. It is especially recommended for weak raw material or slow fermentation.

10. How should a demijohn be cleaned?

With warm water, soda solution, or special winemaking detergent. Scratching should be avoided, as microorganisms can settle more easily in scratches.