Kathan Brown, the founder of the San Francisco-based company Crown Point Pressbrigadeiropg, who helped revive the centuries-old art of intaglio printmaking in the United States, producing limited-edition prints by artists like Elaine de Kooning, Chuck Close and Francesco Clemente, died on March 10 at her home in the Bay Area. She was 89.

Her death was confirmed by her son, Kevin Parker.

Ms. Brown spent more than 60 years establishing her reputation as a master of a printing technique that goes back to 15th-century Europe and was used by the likes of Rembrandt and Albrecht Dürer.

Crown Point Press is “the most instrumental American print shop in the revival of etching as a medium of serious art,” the art historian Susan Tallman wrote in her 1996 book, “The Contemporary Print.”

Unlike the more common practice of lithography, which uses chemicals to bind an image to the flat surface of a metal plate or stone, intaglio printing involves etching the image into a copper or zinc plate with a stylus or with acid, creating grooves that are then filled with ink.

The burrows are typically empty because the creatures that constructed them were soft-bodied invertebrates that often don’t fossilize well. On exposed rocks in the bed of the Sambito River in northeastern Brazil, Dr. Sedorko saw an imprint of a small worm inside one Bifungites. Within hours, his team found seven other fossilized burrows with the same worm imprint, indicating that these organisms produced them.

When the plate is run through the steel rollers of the press and the image is transferred to paper,ijogo slots the ink reservoirs create a deep color saturation and a velvety quality, Valerie Wade, the director of Crown Point Press, said in an interview.

Ms. Brown typically invited artists, both emerging and established, to Crown Point for two-week residencies. The point was not to create reproductions of existing works, but to produce originals — or “unique multiples,” as the company calls them — in editions of 25 to 35. Over the years, Ms. Brown’s stable of artists included luminaries like Sol LeWitt, Pat Steir, John Baldessari, Helen Frankenthaler, Chuck Close and Ed Ruscha.

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