As a fresco painting drew close to completion, the artists would add a final layer of smooth plaster known as

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The final layer of smooth plaster added to a fresco painting is known as an intonaco. An arriccio is the rough layer of plaster applied first, while a sinopia is a preliminary sketch or underdrawing. A gironata refers to the daily work session of applying one day's worth of plaster.

As a Fresco Painting Drew Close to Completion, the Artists