The eighteenth century books from the collection of the old digital library of the Library University Seville are analyzed to locate the parts made with decorated papers, in order to classify and describe them according to the proposals of specialized literature. For this, the records included in the repository of the digital collection are recovered, the digital reproductions of the books are visualized, the parts with decorated papers are identified and described following the decorated papers classification model, previously elaborated, based on the research of Professor Carpallo Bautista. The model is made up of 6 techniques and their variants. Of the more than 6.700 records from the 18th century in the collection of the digital ancient collection, 511 include decorated papers in their bindings. [ABSTRACT FROM AUTHOR]