For centuries, distinguishing an authentic painting from a copy relied primarily on the eye and experience of the expert: art historians, antiquarians, restorers. Visual sensitivity, knowledge of style, and intuition developed over time were the main compasses in the often intricate navigation of artistic attribution. But today, alongside this knowledge, there is a valuable new ally: the science of art, a set of tools, techniques and methodologies that allows one to literally penetrate beneath the surface of a work and read it as never before.
Authentication through scientific means is not entirely new-the first experiments date back to the 19th century-but in recent decades it has made a remarkable qualitative leap. Modern technologies make it possible not only to identify materials and techniques used by the artist, but also to reconstruct the execution phases of a painting, to detect any alterations, hidden restorations, and forgeries.
One of the most widely used tools is infrared reflectography, which allows us to see beneath the paint surface, revealing the original preparatory drawing, if any. This detail is crucial: many Old Masters drew preliminary sketches on canvas or panel, and comparing this drawing to the final work can reveal much about the artist’s hand. A work without underdrawing, or with a visibly uncertain drawing, could indicate a copy.
Ultraviolet fluorescence is also a key tool. Using a UV light, it is possible to identify areas where paint has been retouched or added later, often during restorations. Old and modern paints react differently to ultraviolet light, showing color contrasts that the human eye would not pick up in natural light. This type of analysis is particularly useful in understanding how much of a work is original and how much has been reworked.
X-rays allow one to go even deeper, literally. An X-ray analysis makes it possible to observe the internal structure of the support, the distribution of pigment, the presence of pentimenti (changes in the course of execution), but also hidden details: covered signatures, other paintings reused as a base, modified frames. Sometimes, an X-ray reveals a second painting beneath the visible one, or a completely different composition, revealing reuse practices that were very common in the past.
Spectroscopy and chromatography, on the other hand, are chemical analysis tools that can identify the composition of pigments. This analysis can be of decisive value: if a declared seventeenth-century painting contains synthetic colors invented in the nineteenth century, it is clear that the work is a copy or a forgery. Conversely, the identification of pigments compatible with a certain era strengthens the possibility of authenticity.
Another booming field is that of painterly binder analysis: oil, egg, animal glue. Every era and school of painting has favored certain materials, and their identification helps to place the work in its proper context. Some specialized laboratories today manage to extract micro-samples invisible to the naked eye and analyze their composition with very high precision, without damaging the work.
Also important are noninvasive analyses, which are much more accessible and refined today than in the past. The use of multispectral scanners, lasers, and advanced photogrammetry makes it possible to create digital models of the work, to map its state of preservation, and to document each stage of a restoration with very high definition. These tools do not replace historical and stylistic analysis, but complement it, providing a body of objective data from which to make any assessment.
Of course, no technology alone can “certify” the authenticity of a work. The final judgment always remains the result of an integrated reading: material, historical, stylistic. But art science today provides indispensable tools to proceed methodically, to avoid fraud, to answer complex doubts, and to restore dignity to forgotten or misattributed works.
For the collector, understanding the existence and functioning of these tools means equipping oneself with greater awareness. There is no need to become a technical expert, but it is useful to know what to ask, who to turn to, when an analysis is really necessary. Above all, it is essential to understand that technology is not an obstacle to beauty: on the contrary, it can be the most effective means of bringing it out clearly, without ambiguity.
Today, the world of pictorial antiques can no longer do without science. Because every painting, before it is hung on a wall, deserves to be heard with all the tools at our disposal. And among these, the most silent and invisible ones are often also the most revealing.