Kneading is a fundamental technical stage in the production of both dry and fresh pasta, following the mixing of durum wheat semolina and water. During this crucial step, the dough acquires cohesion, plasticity and structural uniformity.
It is during kneading that the gluten network develops properly, forming the protein “skeleton” of pasta. Parameters such as hydration, temperature and processing time directly influence performance during extrusion and, ultimately, cooking quality. Understanding kneading means understanding a key step in both industrial and artisanal pasta production.
What is kneading and what function does it perform?
From mixing to the formation of a plastic mass
After milling, durum wheat semolina is combined with water in mixing tanks. Water is not simply an ingredient, but a key reactant that allows starch and proteins (glutenin and gliadin) to interact and bind.
This interaction forms gluten: a three-dimensional protein network that:
- traps hydrated starch granules
- gives the dough elasticity and strength
- allows pasta to maintain its shape and “al dente” texture after cooking
Development of the protein network and homogenization
Kneading transforms a loose mixture of hydrated particles into a compact, cohesive mass. The mechanical action of a screw conveyor inside a cylindrical chamber compresses the dough, activating physicochemical processes driven by shear forces and the resulting thermal energy.
A key technical factor is particle size: a coarser semolina granulometry (450–500 microns) enhances the technological properties of the wheat, ensuring a more compact dough and improved texture in the final product.
Technical parameters and process control
To ensure high-quality standards, process parameters must be carefully controlled. Modern kneading is typically performed under vacuum for three main reasons:
- Air removal: to prevent internal micro-fractures and structural weaknesses
- Oxidation prevention: to preserve the natural amber-yellow color of semolina by protecting carotenoids
- Enzymatic control: to limit lipoxygenase activity, which could affect flavor
Hydration and temperature
The process is carried out under controlled temperature conditions (typically 40–45°C) to avoid premature starch gelatinization.
| Factor | Influence |
| Water content | Depends on semolina moisture and pasta format |
| Water temperature | Lower for long and hollow pasta; 35–45°C for egg pasta |
| Vacuum pressure | Essential for brightness and structural compactness |
Impact on final quality: extrusion and cooking performance
Kneading prepares the dough for extrusion, during which it is forced through a die. The quality of the protein network developed during kneading determines how the dough responds to extrusion stress.
- Teflon dies produce a smooth and uniform surface. While visually consistent, they generally result in lower cooking resistance and reduced sauce adhesion.
- Bronze dies create a rough, porous surface due to friction, enhancing the pasta’s ability to retain sauces. When combined with optimal kneading, this results in superior cooking performance and a firm, resilient texture.
