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In traditional shipbuilding, lead minium has long been a standard product for protecting wood and metal assemblies. This highly effective anti-corrosion paint was applied to fittings, bolts and certain structural parts. But because of lead's toxicity, its use is now strictly regulated.
A historic product of wooden shipbuilding
Lead minium is a pigment based on lead oxide. Mixed with an oil or binder, it forms a paint that is particularly resistant to humidity and corrosion.
Minium was also used in shipbuilding as an anticorrosion primer before painting. Its ability to prevent metal oxidation in humid environments made it a highly appreciated product.
Toxicity has led to strict restrictions
Lead is now recognized as a toxic substance for human health and the environment. Inhaling or ingesting lead dust can cause lead poisoning, a serious intoxication that affects the nervous system in particular.
For this reason, the use of lead minium is severely restricted in Europe. It may not be marketed to the general public. Products containing lead may only be used in specific professional contexts and under certain conditions.
Exceptions for maritime heritage restoration
Certain exceptions may apply to the restoration of heritage vessels. Listed historic boats or identical restorations may sometimes require the use of original techniques or products.
In these situations, professionals must follow strict protocols:
- work in controlled environments
respiratory protection and suitable equipment
specific management of lead-containing waste
traceability of products used
These conditions are designed to limit risks to site workers and the environment.
Substitute products now preferred
Today, shipyards prefer modern, lead-free anticorrosion primers. Epoxy or polyurethane paints offer comparable, if not superior, protection against oxidation.
They preserve wooden components while complying with current health standards. In shipyards specializing in the restoration of traditional boats, lead minium remains above all a historical marker of an era when environmental and sanitary constraints were still little taken into account. Today, its presence in shipbuilding workshops has become exceptional.
