Beyond appearance: the technical review of furniture

An antique piece of furniture is never just about its appearance. Behind its style, its decoration or its signature lies a material reality: woods, veneers, joinery, fastening systems and traces left by the tools that participated in its manufacture.

Within our workshop, we regularly offer expert opinions on the technical aspects of furniture. Our approach involves comparing the piece's presumed history with its material reality, combining in-depth observation of the cabinetmaking, the study of manufacturing techniques, and, when necessary, the use of specialized scientific analyses conducted by laboratories to confirm or refute our assumptions. The goal is to determine, as precisely as possible, the period of manufacture, the coherence of the piece, the nature of its materials, and any alterations it may have undergone.

The study of a piece of furniture begins with careful observation of its construction: the types of wood and the nature of the materials, the structure and composition of the panels, the joinery and methods of fixing, the veneers and their cutting techniques, the traces of tools and machining, the manufacturing techniques, as well as any restorations, modifications or replacements.

These observations allow us to place the piece of furniture within the evolution of cabinetmaking techniques and to compare its construction with the period to which it is attributed. The technical analysis thus makes it possible to seek consistency between the style, materials, construction, and manufacturing processes.

Manufacturing techniques leave traces on the furniture that are sometimes invisible at first glance. Observation in raking light can reveal undulations, cross-grain chips, or marks characteristic of mechanical machining, allowing identification of the use of tools and machines that appeared at certain periods in the history of cabinetmaking.

The saw marks on the underside of the veneers also provide valuable clues. Their regularity, parallelism, and spacing reveal the sawing process used and help place the piece of furniture within its historical context. These marks are veritable technological fingerprints: they allow us to understand how a piece of furniture was made and to determine whether the observed techniques are consistent with the period attributed to it.

When the technical examination requires it, our opinion may be supplemented by specialized scientific analyses conducted in conjunction with laboratories. These investigations provide objective data to confirm or refute our assumptions and allow for a better characterization of certain materials.

Depending on the nature of the furniture and the problem encountered, these analyses may focus on the characterization of the constituent materials, the identification of the wood and veneer species, the study of pigments, dyes and finishes, the identification of glues, varnishes and restoration materials, dendrochronology when the wood lends itself to it, or even physico-chemical methods for cases requiring a precision greater than that of visual examination alone.

A serious technical opinion is never based on a single indicator. Its value lies in the comparison of several sources of information: the material (wood, veneers, constituent materials), the construction (assemblies, panels, fastening systems), the technology (tool marks, machining processes, manufacturing techniques), the scientific analysis (characterization and comparison of materials) and the historical context (evolution of cabinetmaking techniques and practices).

The convergence of these elements makes it possible to establish a reasoned technical opinion on the period, construction and history of the piece of furniture.

An attribution or signature is part of a piece of furniture's history, but it must be considered in light of its material reality. A piece of furniture may exhibit the stylistic characteristics of a particular period while revealing, through its construction, techniques that emerged several decades later.

The study of the joinery, screws, tabletop construction, veneers, and tool marks can then highlight any inconsistencies. This approach illustrates the importance of a technical assessment that goes beyond simply observing the furniture's appearance, seeking to determine its true nature.

Each piece of furniture has its own history, construction, and specific issues. The technical assessment is therefore tailored to each piece, from visual examination to any additional investigations that may be necessary: visual examination, study of materials, analysis of construction and joinery, search for tool marks, further scientific analyses, and comparison with historical data, all leading to a well-reasoned technical opinion.

By combining cabinetmaking expertise, technical observation and a scientific approach, the technical opinion allows for a better understanding of the true history of the furniture.

Here, as an example, is a study of tool marks and manufacturing techniques carried out on a stamped pedestal table.