THE'grazing light analysis It is a non-invasive optical diagnostic technique, used for examine the surface morphology of works of art. The method involves the use of a light source placed at a very low angle with respect to the plane of the artefact. In this way, the grazing light generates strong shadows that highlight even minimal discontinuities in the surface.

As a result, it is possible to detect cracks, lifts, Support deformations, abrasions And detachments of the pictorial layers. In addition, this mode allows you to observe details related to the executive technique, such as brushstroke imprints, material reliefs, chromatic stratifications and regrets.

There grazing light It is applied not only on pictorial surfaces, but also on sculptural elements, gilding and complex decorations. The main advantages include speed, non-invasiveness and the high capacity to report physical alterations. For this reason, the technique is often used as first level tool during integrated diagnostic campaigns.

In fact, it is combined with other methods, such as the infrared reflectography, the X-ray and the multispectral analysis, for a more in-depth assessment of the state of conservation. In contexts of periodic monitoring, it is particularly useful thanks to its ease of use and the possibility of comparison over time.

In conclusion, thegrazing light analysis It represents a fundamental tool in the diagnostic protocol, as it allows the collection of useful information both for the preventive conservation both for the design of sustainable restoration interventions consistent with the nature of the cultural asset.