Scientist finds secret Renaissance painting ingredient
It was long thought that Venetian painters, glassmakers and ceramic designers each had their own ways of concocting paints and dyes, probably getting the ingredients through apothecaries, as in most of Europe.
But Louisa Matthew, head of the Visual Arts Departments at Union College in Schenectady, N.Y., found evidence that Venice developed a special market for dyes and pigments a century before other European areas did.
She was poring through the Venetian archives for information on how local artists did business. Among the dusty wills and tax records, she came upon an inventory of 102 items drawn up after the death of shop owner Domenico de Gardignano. He is identified in Italian as “dai colori” — “among the men in the color business.”
“There are certain pigments that contain glass mentioned in the 1534 inventory, but by no means all,” Matthew said. “Because (customers) were all buying colorants in the same place, we hypothesize that they traded ideas and ingredients including materials not on the shelf.”
People from many different trades bought supplies at de Gardignano’s shop and were likely to have shared both ideas and materials, Matthew surmised.
That possibility led to Berrie’s examination of paint samples under an electronic microscope. She discovered rounded bits of powdered glass, only thousandths of an inch thick, in two paintings by Lorenzo Lotto — one in a red gown worn by St. Catherine, another in an orange-red coat worn by Joseph in a Nativity scene.