Britannica
Sources used in this answer
How did sinopia function as a preliminary drawing for fresco painting?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
Drawing
The Artist's Sister, Edma, with Her Daughter, Jeanne, watercolor over graphite on paper by Berthe Morisot, 1872; in the collection of the National Gallery of Art, Washington, D.C.
In the context of fresco painting, a sinopia served as a vital preliminary guide for the artist. It was a reddish-brown earth pigment used to draw the composition directly onto the arricciato, which is the rough-cast layer of plaster applied to the wall before the final painting surface.12
The process functioned as follows:
- Outlining: After the initial design was transferred to the arricciatoâoften by pouncing or engraving the outlines of a preparatory cartoonâthe artist would reinforce these lines using the reddish sinopia pigment.2
- Guidance: Once the sinopia drawing was complete, a thin layer of fine plaster, known as the intonaco, was spread over the wall. Because this final layer was thin, the linear design of the sinopia remained visible through the plaster, providing the artist with a clear map to follow while applying pigments.2
- Execution: This allowed the painter to execute the work rapidly before the intonaco set, ensuring the design remained accurate while the pigments fused with the damp plaster to become a permanent part of the wall.2