Size: F4 33.3 x 24.2 Framed size: 51.3 x 42.5 x 4.6 Materials, Technique: oil on wooden board Framed: oil frame. With back surface cover. Hanging string attached. Box:Insert box In order to express the long-aged style of the Renaissance master's sketches in oil, the artist applied a fine aged matiere to the base of the painting, and then used a sophisticated technique to express light and dark by the thickness of the paint film, rather than the brightness of the paint, so that the base of the painting would become transparent. This allows the viewer to enjoy the texture of the painting, such as the very fine grain on the skin or the undercoat showing through the gaps in the hair. In addition, oil paintings usually have a strong gloss, but this work is painted in a special way that suppresses reflections thoroughly without using matte varnish, so it is highly visible and can be displayed in any place.