What is an example of the blending technique observed in Leonardo da Vinci's 'Mona Lisa'?

The blending technique exemplified in Leonardo da Vinci's 'Mona Lisa' is known as sfumato. This technique involves the careful gradation of tones and colors to create a soft, blurred effect that enhances the overall realism and depth of the painting. Sfumato allows for smooth transitions between light and shadow, contributing to the lifelike quality of the subject's features and the atmospheric perspective of the background.

Moreover, sfumato is particularly effective in depicting soft edges and subtle differences in color, which helps convey a sense of volume and three-dimensionality. In 'Mona Lisa', this technique is especially evident in the rendering of her face and the background, creating a harmonious and enigmatic ambiance that has captivated viewers for centuries.

In contrast, other techniques listed, such as chiaroscuro, involve strong contrasts between light and dark, while unione refers to the blending of colors without losing their vibrancy. Cangiante relates to the use of color shifts to depict light and shadow. Although these techniques play a role in Da Vinci's overall technique, sfumato specifically captures the gentle blending characteristic of the ‘Mona Lisa’.