Arriccio

Arriccio is a term used in traditional Italian plastering techniques, particularly in the context of applying lime-based plasters. It refers to the second layer of plaster that is applied over the rinzaffo (scratch coat) and serves as a base for the final decorative finish.

The arriccio layer is typically a mixture of hydrated lime, sand, and water, similar to the rinzaffo layer. However, the consistency of the arriccio is usually slightly thinner to allow for easier application and leveling. It is applied over the cured rinzaffo layer and smoothed out using a trowel or a float.

The purpose of the arriccio layer is to provide a solid, level, and uniform surface for the subsequent layers of plaster. It helps to fill any voids or irregularities left by the rinzaffo and creates a smooth and consistent base for the final decorative finish.

After the arriccio layer has been applied and leveled, it is left to partially dry and cure. This stage is crucial as it allows the arriccio to develop sufficient strength and stability before the final decorative finish, known as the intonaco, is applied.

The use of arriccio in traditional lime plastering techniques ensures a stable and durable plaster system. It provides a reliable foundation for the decorative layers, improves the overall appearance and quality of the finished plasterwork, and contributes to its longevity.

It's important to note that the specific composition and application techniques of arriccio may vary depending on regional traditions and the desired final result. However, the general purpose of the arriccio layer remains consistent across different lime plastering practices.

Arriccio is an essential intermediate layer in lime plastering, serving as a base for the final decorative finish and contributing to the overall strength, stability, and aesthetic quality of the plaster system.