Image Courtesy: POSTECH
A team of South Korean researchers has successfully recreated sea silk, one of history’s rarest and most coveted textiles, reviving a shimmering golden fabric once reserved for emperors, religious leaders, and the elite of the ancient world.
Scientists from Pohang University of Science and Technology, commonly known as POSTECH, developed a sea silk-like fiber using threads produced by the pen shell, a shellfish cultivated in Korean coastal waters. Their research not only reproduces the appearance of the legendary material but also reveals the scientific secret behind its enduring golden glow.
Known as the “golden fiber of the sea,” sea silk was traditionally woven from byssus threads produced by Pinna nobilis, a large Mediterranean shellfish. The fabric became famous during the Roman era for its lightweight texture, durability, and metallic sheen, earning a near-mythical status among luxury materials.
That legacy nearly disappeared in modern times. Environmental degradation and marine disease outbreaks pushed Pinna nobilis toward extinction, leading to strict protections across Europe and effectively ending commercial production. Today, authentic sea silk survives only in tiny quantities crafted by a handful of artisans.
Seeking a sustainable alternative, researchers turned to the pen shell, Atrina pectinata, whose byssus fibers are typically discarded as waste. The team discovered the fibers closely resemble those of Pinna nobilis and developed a process that transforms them into a material visually and chemically similar to historic sea silk.
The breakthrough extended beyond recreating the textile itself. Researchers found that sea silk’s famous golden appearance is not produced by dyes or pigments. Instead, the color comes from microscopic protein structures known as photonin, which manipulate light through a phenomenon called structural coloration.
This process is similar to how butterfly wings, peacock feathers, and soap bubbles generate vivid colors. Because the effect is created by the material’s internal structure rather than applied dyes, the golden hue remains remarkably resistant to fading, helping explain how historical sea silk artifacts have retained their brilliance for centuries.
The findings could have implications well beyond textile conservation. Structurally colored fabrics require no traditional dyes or metal-based pigments, potentially reducing environmental impacts associated with textile manufacturing. Researchers say the technology may contribute to the development of longer-lasting, more sustainable materials for fashion and advanced industrial applications.
By transforming a marine byproduct into a high-value material, the project also highlights a new approach to reducing waste while preserving a piece of cultural history once thought lost to time.
