Resumen
This article presents an in-depth study of Raphael?s drawing of Leda and the Swan (RCIN 912759), preserved at Windsor Castle. The research aims to make the paper?s physical properties accessible and extend the information on the watermark. The methodology follows an artistic?design-oriented approach. The data extraction process uses a back-lighting photographic technique combined with image post-processing operations. The work catalogues in scientific terms the complete paper mould lines of the Windsor sheet according to the International Standard of Paper Classification (IPH). Based on comparisons with a series of drawings by Leonardo da Vinci, the contribution suggests a chronological and provenance estimate of the paper used by Raphael.