To the uninitiated eye, the exuberant and technically brilliant prints that walked down spring runways at Dries Van Noten, Prada and Dolce & Gabbana might evoke a trip to the lush gardens of Giverny or Tahiti. Or they could appear to be the result of a completely different kind of psychedelic trip. But to those in the know—designers, fabric-mill owners and trend spotters—the plethora of prints this season summons something much closer to home: Ratti, the fabric and printmaking house based in Como, Italy.
Founded in 1945 by Antonio Ratti, the printmaker and silk weaver has become the go-to source for...