Vacuum curing

To preserve the wood, slow down ageing and avoid rotting, we use a vacuum curing process. Read more about our process.

We have developed a process

With the help of leading experts, we have developed a system for vacuum impregnation-curing of wooden objects. Vacuum impregnation protects and hardens weak wood. The process allows the use of different hardeners and ensures full-thickness impregnation.

Wood has many pests

As a natural material, wood is highly susceptible to degradation, especially when insect and fungicidal pests come into contact with the wood. Damage occurs in wood, which significantly changes the basic properties of the wood. Damage can be so severe that it seriously threatens the continued existence of the object.

Manual impregnation

To preserve the most badly damaged elements, the restorers started by hand-fixing the bad wood using glues and natural and artificial resins. Hand curing can be successful for smaller volume items because the curing agent does not penetrate the entire mass of the item when applied by hand.

Hand-impregnation-curing of larger objects only cures the outer layer, while the interior is not cured.

Vacuum impregnation

gives us excellent results, and it is on the most damaged wood that we get the best results. Interestingly, the piece of wood weighed 1kg before impregnation and 2.38kg immediately after impregnation. After conditioning and curing, the weight of the object is 1.37 kg. The weight has been increased at the expense of the impregnant used to stiffen the object.

Example of monitoring the effectiveness of wood impregnation with a confocal microscope

(Author: Mateja Golež, Luka Škrlep, Janko Čretnik, Alenka Mauko, ZAG)

Non-impregnated wood pattern

Impregnated wood pattern

SEM micrograph of wood fibres

Time after impregnation

Colour polygon of the depth of damage to a wooden object. Dark blue colour represents the deepest damage – 3.5 mm

Pore filling with an impregnating agent

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