The soft part of the bread. In pencil drawings and in watercolour, it was traditionally used to soften the line of the pencil or to subdue a colour that is too intense. In restoration, it was used in the cleaning of paintings. Giovanni Secco Suardo (1894) notes that the soft part of the bread cooked the day before, and rubbed onto a painting, "removes the dust and the light dirt" and "used with caution may also clean tempera in mural painting."