Buon fresco –Buon Fresco is the painting of an image on wet plaster using a ‘cartoon’. With this method the fresco may be applied to limestone, brick or stone walls. The painting surface is made up of a mixture of aged lime putty and washed river sand. There are two layers applied. Firstly the ‘arricio’ and then a finer mixture for the painting surface called the ‘intonico’. One paints onto this wet surface with a mixture of pure pigment and water. This technique was used in Egypt, Europe, Mexico and South America. It is from this technique that other modern methods have evolved.