Four Character Heads of Boys and Men of Different Ages, Carlo Biffi, c. 1635 - c. 1650
Carlo Biffi was actually trained as a sculptor. However, this etching – one of only two that we know by him – bears witness to his graphic talent. The four heads are printed on blue paper, and heightened with white to increase the plasticity of the image. The effect of depth is enhanced by the fact that the heads were etched from front to back with ever thinner lines.