Toffoli's canvases immediately impose themselves on the visitor, the light is transparent, crossing all the forms, it seems to come out of the paintings and the impression of purity that emerges creates a deep intimacy with the characters. Louis Toffoli would be in search of an unusual inner truth, the colors and lights vibrating in his paintings make the patterns of the canvas sing and delight the viewer.

Louis Toffoli uses only one technique for his painted works: chalk. The subjects are often found on waxed canvases, with the light shining through in a different way depending on the support. Louis Toffoli devoted a period of his work to the work on light in lithography. He also dedicated a work to the work of the lithographer with La Presse à bras.