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"Optical ash" is manifested transparent painting a visual effect

. Ancient artists or oily tempera colors on the bottom were stained with glaze after resin varnish coated with transparent or translucent overlay that revealed by overlapping colored layer, which produce strange color transparent gray - "Optical ash" . This transparent gray and deployed out of gray compared to the visual effect is not the same. It is a direct painting can not achieve. Rubens was on to create the optical ash is known, he told his students, said:. "At least the last layer of dark color department should be transparent."

(by thomas kinkade prints)


Mixed color paintings and oil painting techniques introduced

Mixing techniques need to grasp the color and painting painting techniques, this technique is by Degas invention, in Toulouse - Lautrec's works have used, is to use turpentine to mix oil paints, oil paints to make consistency become with gouache paint like to create a matte effect. Degas also do not like thick oil paint, sometimes he would take advantage of the pigment or pigment wetting when scraped from the canvas, then get a soft and his favorite mural similar effect

(by jack vettriano prints)


Da Vinci sketch drawn spine is believed to be the first time an accurate description of the spine.

Abraham Adams said that Leonardo da Vinci painted the exact

structure of the spine and spinal curvature and inclination

between. Leonardo da Vinci painting sketch enough to lay status

in the history of the study of anatomy. As a two-dimensional

image, the accuracy with which the current image is comparable

to any of the spine.
In addition to the spine sketch, the Leonardo da Vinci's many

human anatomy have contributed to the boundaries of anatomy

studies. In addition to the skull, but he was all the bones in

the human body were dissected leaves precious research and

written records. Abraham Adams said that Leonardo da Vinci was

an outstanding architects and engineers, which can help him

understand the structure and workings of the human body. He

said: "This mechanical science and engineering research methods

was very popular in the field of surgery over the past five or

six decades."