The man who folded silk

Mariano Fortuny y Madrazo (1871-1949) was a Spanish-born, Venice-based designer, painter, photographer, lighting engineer, and inventor. He held more than twenty patents across textiles, theatre, photography, and architecture. He is, in fashion's institutional memory, primarily remembered for one of them: a method of permanently pleating silk that produced the Delphos gown.

It is a thinner reading than he deserves. Fortuny was an engineer in the deepest sense, a designer for whom material, mechanism, and meaning were a single problem. His pleat was not a stylistic flourish. It was a technical solution that happened to look beautiful, and it changed everything that came after.

From Granada to Venice

Fortuny was born in Granada in 1871 into a family already steeped in art. His father, also Mariano, was a celebrated genre painter who died when his son was three. His mother moved the family first to Paris, then in 1889 to Venice, where the household became one of Europe's most discerning collectors of antique textiles and historical garments.

That collection was Fortuny's first laboratory. He spent years dismantling, examining, and reverse-engineering centuries-old fabrics, particularly the heavy stencilled silks of the Italian Renaissance and the woven tunics of ancient Greece. Two influences would prove decisive: classical Greek dress, with its naturally falling vertical folds, and the operatic stagecraft of Richard Wagner, whose theatrical theories of light and form Fortuny would later translate into both lighting engineering and garment design.

The Delphos, and the patent that did the work

In 1907, Fortuny introduced the Delphos: a column of pleated silk modelled on the chitons worn by figures in classical Greek statuary, particularly the Charioteer of Delphi. The dress fell straight from the shoulder in hundreds of fine vertical pleats and clung to the body without seams or structure. There were no corsets. No bones. No tailoring in the conventional sense. The pleats did the work.

Two years later, in 1909, Fortuny filed the patent that made the Delphos possible. The patent (FR402584, "A new genre of pleated cloth, applicable in the textile and dressmaking industries") described a method for permanently setting fine, irregular pleats into silk through a combination of heat, pressure, and proprietary chemistry. He never disclosed the exact process publicly. To this day, no one has fully replicated it.

It is worth pausing on what this means. In an era when most fashion innovation lived in cut and ornamentation, Fortuny was making a material innovation, a textile that behaved differently from its base fabric because of how it had been engineered. The dress was almost a consequence of the textile, not the other way around.

The Knossos scarf and the wider invention catalogue

The Delphos was not Fortuny's only textile invention. In 1906, he introduced the Knossos scarf, a long rectangular silk veil printed with geometric motifs derived from Cycladic and Minoan art. The scarf became a kind of universal garment, draped, twisted, or folded by the wearer into endless variations. One textile, multiple configurations. A garment whose form was determined in use, not at the point of manufacture.

His patents stretched well beyond clothing. He invented a system of indirect stage lighting (the Fortuny dome, or cyclorama) that abolished painted backdrops in theatre and is still in use today. He developed the Fortuny lamp, designed to bounce light off curved silk surfaces for diffused indoor illumination. He patented improvements in photographic paper, a folding camera, and a printing process for fabric that allowed complex multi-colour designs without registration errors.

Each of these inventions returned, in some way, to the same preoccupation: how to make a material do more, with less.

From Delphos to deployable structures

Petit Pli's patented pleat system is, like Fortuny's, an engineering answer to a design problem. Children grow through up to seven sizes in their first three years. Clothing built to a single fixed size is obsolete within weeks. So we asked: could a textile be engineered to expand with the child?

The answer came from an unlikely source. Petit Pli founder Ryan Mario Yasin was an aeronautical engineer researching deployable structures for small satellites, geometries that fold tightly for launch and unfold reliably in orbit. Apply that thinking to fabric, and a garment can expand bi-directionally as a child grows. One piece fits through seven sizes. The pleat does the work.

Our newest Knot-Tile range applies the same principle in a different medium: 100% extra fine merino wool, knitted with an auxetic structure built directly into the textile. Where Fortuny used heat and pressure to set permanent vertical pleats in silk, our design team developed a way to reverse the stitching on knitting machinery so that wool fibres pull, contract, and fold into a structure that expands when the child does. A different variation on what Fortuny was after: a textile whose intelligence is built into the fabric itself.

Why this lineage matters

It would be easy to read Fortuny as a curiosity, a museum artefact best appreciated under archival lighting. We prefer a different reading. Fortuny is a reminder that the most enduring innovations in clothing are usually not stylistic. They are structural. They redefine what fabric is capable of, and let the form follow.

Every era gets the pleats it needs. Fortuny's were a response to the corseted excesses of late-Victorian dress, a return to classical freedom of movement. Miyake's were a response to the formality of 1980s power dressing, designed for movement, travel, and everyday wear. Different problems. Same instinct. The future, as we like to say, belongs to the curious.