Receitas oitocentistas para a conservação de gravuras: "restauração de quadros e gravuras", de Manuel de Macedo

The analysis of treatises reveals a crucial effort to deepen the scientific knowledge in conservation and restoration, particularly with regard to knowledge of artistic techniques and specific techniques of "restoration". The book "Restoration of paintings and prints", written by Manuel de Macedo (a museum curator in 1884) and published in 1885 is a very important source of information. Although this book has often been cited in scientific articles and research works, it was never properly dissected in all its parts, by its own merits, and therefore is our intention to share the information it contains, in an effort to promote Portuguese treatises of the nineteenth century. We have structured our analysis into two parts, one devoted to criteria and procedures relating to prints, and a second devoted entirely to oil painting on canvas, wood and copper. In the current paper we analyse the first part.