Painting with Oils
October 20, 2008

A2 Oil painting is the process of painting with pigments that are bound with a medium of drying oil -- especially linseed oil, poppyseed oil, walnut oil, and safflower oil. These oils confer various properties to the oil paint, such as less yellowing or different drying times. Certain differences are visible in the sheen of the paints depending on the oil. Painters often use different oils in the same painting depending on specific pigments and effects desired. The paints themselves also develop a particular feel depending on the medium.

Paintings in this medium are very popular amongst artists and collectors because of their ageless character. They lend themselves to a plethora of subjects, and well executed paintings remain vibrant and attractive for several centuries. The two paintings here were painted by Rembrandt and Caravaggio almost 400 years ago!


A1_5 Traditionally, artists begin by sketching the subject onto the canvas. The oil paint is mixed with turpentine or artist grade mineral spirits or other solvents to create a thinner, faster drying paint. Then the subject is built up in layers. A basic rule of oil paint application is 'fat over lean.' This means that each additional layer of paint should be a bit oilier than the layer below, to allow proper drying. As a painting gets additional layers, the paint must get oilier or the final painting will crack and peel.Oil paint remains wet longer than many other types of artists' materials, enabling the artist to change the color, texture or form of the figure. At times, the painter might even remove an entire layer of paint and begin anew. This can be done with a rag and some turpentine for a certain time while the paint is wet, but after a while, the hardened layer must be scraped. Oil paint dries by oxidation, not evaporation, and is usually dry to the touch in a day to two weeks. It is generally dry enough to be varnished in six months to a year. Art conservators do not consider an oil painting completely dry until it is 60 to 80 years old. A still-newer type of paint, heat-set oils, remains liquid until heated. Although not technically not true oils, the paintings resemble oil paintings and are usually shown as oil paintings. A1_3 The easiest way to start painting with oils may be with Winsor & Newton Artisan Water Mixable Oils. These water-soluble oils are easy to clean up and have no hazardous fumes. Time to stretch a canvas, grab a brush, and start!
October 20, 2008 / category: Paintbrush / link / comments (0)

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