Leakage refers to a phenomenon in which liquid seeps between the cork and the bottle glass, or even through the cork itself, particularly in the case of wine. This leakage generally occurs after the bottling stage and can lead to product loss as well as deterioration in product quality.

What are the main causes?

There may be several reasons for this phenomenon, and multiple technical or environmental factors can contribute to its occurrence:

Excessive pressure between the liquid and the cork: This often occurs when inerting is insufficient, i.e., when air is not adequately removed from the bottle before corking. Excess pressure inside the bottle can then force the liquid through the cork.

Insufficient headspace : An unsuitable expansion space can limit the space required to balance internal pressures, increasing the risk of leakage.

Cork integrity defect: If the cork has flaws, cracks, or a non-uniform structure, this can lead to leakage through cork absorption.

Bottle neck dimensional non-conformity: If the bottle neck does not precisely match the dimensions of the cork used, the seal may be compromised, allowing the liquid to escape.

Unsuitable storage or transport conditions: Excessive temperature or pressure variations during these stages can cause the liquid to expand or contract, increasing the risk of leakage.

What solutions can prevent leakage?

Here are a few measures you can adopt to reduce the risks:

Choose premium-quality corks: Opt for Francelina corks, which benefit from individual sealing control, ensuring an optimal barrier against leakage, particularly for wines.

Carry out a dimensional analysis of bottles: Our laboratory can analyze the exact dimensions of your bottles to ensure the corks are perfectly suited, whether for wine or spirits.

Cork storage and stock rotation: It is essential not to store corks for more than six months and to use them quickly after opening the bags to ensure freshness and performance.

Train operators: Proper training for bottling line operators helps ensure each step is carried out under the best conditions, thereby limiting the risk of errors that could lead to leakage.

Check bottle necks: Ensure that the bottles used have compliant and reliable necks, guaranteeing perfect compatibility with the corks.

Keep bottles upright after bottling: After bottling, it is recommended to let the bottles rest in an upright position for at least 10 minutes. This helps stabilize the cork and prevent immediate leakage.

Optimized storage and transport: Limit exposure to extreme temperatures and significant pressure variations during storage or transport, as these factors can negatively affect the cork’s seal.

By applying these tips, you are well on your way to becoming an expert in cork and bottling management without leakage.

Virginie Lopes

To go further: if you would like to learn more or need personalized support, please do not hesitate to contact us—we are here to guide you.