Restauro® IR

Mouthblown protection glass against infrared-radiation with a protective effect integrated into the glass structure itself. Therefore it manages without any coating or externaly applied foils.

Mouthblown protection glass against infrared-radiation with a protective effect integrated into the glass structure itself. Therefore it manages without any coating or externaly applied foils.

Perfect monument preservation
Glass variety

In the spectral range of 780-1500nm it decreases effectively the thermal load on sensitive surfaces of precious artistic and cultural assets.

Historical objects, furniture or room setups if striked by daylight are inevitably exposed to the thermal impact of infrared radiation. The consequences are irreparable material damages in the form of accelerated deterioration and desiccation.

A steady temperature change provokes simultaneously expansion and contraction motions in the surface and thereby tensions, fissures and flaking paint layers. The entry of radiation into rooms occur particularly through window openings. Ordinary glass can not provide any protection.

Production

The process we developed for manufacturing hand-blown IR protective glass combines knowledge of the melt, components and craftsmanship. In the Lamberts glassworks, as one of the last production facilities in the world, hand-blown glass is still produced using the centuries-old craft technique that has hardly changed to this day.

Glassmakers form the viscous glass mass into an elongated glass balloon by turning and blowing on the glassmaker's pipe. Cut open on both sides, the result is a glass cylinder which, when cooled, is cut open lengthways and, after being heated again, is opened and stretched into a flat sheet of glass.

Effect of restauro®IR

The mouthblown special glass restauro®IR decreases however the passage of infrared rays up to 80%. The filter effect is induced by the glass components itself wherefore the glass manages without any externally applied or laminated protection foils or coatings. In this way it is possible to install restauro®IR in narrow rabbets of historical windows as a single glass panel with a thickness of 2-3 mm. In common with every other glass from Lamberts restauro®IR can also be processed to stained glass.

The protection-glass restauro®IR as an all-anorganic material is enduring and ensures an interminable protection. With it’s typical slight distortions this glass fits visually perfect in the structure of historical buildings and redounds at the same time in an aesthetical way effectively to the preservation and preventive conservation of precious artistic and cultural assets.

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Fields of application

Historically valuable objects, furniture and interior design are under the constant influence of daylight and are therefore exposed to the harmful effects of ultraviolet and infrared radiation. The shorter the wavelength, the more energetic and the more damaging its effect on the respective materials. While UV rays bleach organic dyes and destroy the structure of binders and coating layers, IR rays cause drying out and accelerated aging due to their thermal effect. A constant change in temperature on the surface of the object and the associated expansion and contraction movements also provoke tension, cracks and, in the case of paint layers, flaking.

The entry of radiation into interior spaces occurs to a particular extent through the window openings. Simple glass offers little protection here. The hand-blown special glasses restauro®UV and restauro®IR from LambertsGlas®, on the other hand, have a UV or IR protection filter built directly into the glass structure and make an effective aesthetic contribution to the preservation and preventive conservation of valuable art and cultural assets.

Sample projects

Church St. Nikolaus | Wolfsbach/Bavaria

    Quality
    definitely
    Quality
    definitely