Portrait of an Officer of the 18th Hussars – Vicente López Portaña

This portrait by Vicente López Portaña is executed on a linen canvas support, a stable and durable material well suited to long-term preservation. The canvas has not undergone previous lining and remains in good structural condition, with a balanced weave and minimal deformation. The stretcher, although lacking an auxiliary crosspiece, provides sufficient structural stability for the dimensions of the work. All keys are present, though without retainers. A minor issue was identified in the frame, whose internal edges are not beveled, resulting in slight visual interference along the margins of the painted surface. The ground layer, composed of calcium sulfate and animal glue in accordance with traditional methods, presents a fine craquelure consistent with age and environmental exposure. In certain areas, the preparation is notably thin, allowing the texture of the canvas weave to remain visible on the surface. The pictorial surface is generally well preserved, with only limited areas of intervention. Minor overpainting—extending slightly beyond its original purpose—was identified, along with isolated imperfections such as small spots in the background and craquelure linked to the artist’s technique, particularly in darker passages. The varnish layer had significantly deteriorated over time, becoming yellowed and uneven due to oxidation. This alteration reduced the clarity of the composition and obscured the subtle tonal transitions characteristic of López’s refined portraiture. The conservation process began with comprehensive photographic and technical documentation, including ultraviolet light, raking light, and macrophotography, which confirmed the limited extent of previous interventions and the overall high state of preservation. Cleaning was undertaken in two carefully controlled phases. The first removed the oxidised varnish and accumulated surface dirt, while the second addressed minor overpainting and residual impurities. This process restored clarity and revealed the original luminosity of the palette. Minimal chromatic reintegration was carried out using reversible materials, ensuring visual continuity while preserving the integrity of the original paint layers.

A final protective varnish layer was applied to unify the surface and enhance tonal depth. The painting is now presented in a stable and balanced state of conservation, allowing a renewed appreciation of its precision, elegance, and material refinement.

Each restoration is guided by three principles: Respect for the original material, reversibility of all interventions, and clarity of the artist’s intent. At Colnaghi, conservation is both a technical and scholarly process—preserving not only the physical object, but its historical and artistic meaning.