I was browsing through some websites about oil painting techniques. There's this particular website that caught my eye, it's about direct and indirect painting techniques used by some great painters like Titian, Rembrandt and Rubens to construct oil paintings. There are also recommended painting palettes and things to use to create a good painting.
Indirect Painting
This method is used to build up multiple layers of paint and medium to get results of some desired visual effects. Simple technique of applying three distinct layers is used to construct oil paintings.
The painting shown above is taken as an example to illustrate the first step. A dark transparent initial layer made from one or a few colors that relate closely to each other, such as the
Gamblin Transparent Earth Colours . These colors can be used to block in (draw in) the painting. Gamsol odorless mineral spirits and a small amount of Galkyd Lite to thin this layer.
# what is the use of Gamsol odorless mineral spirits?
(1) Thinning oil colors. Stiff oil colors relax immediately when a little Gamsol is added.
(2) Modifying painting mediums.
(3) Studio clean up: brushes, palettes, palette knives, etc.
A middle layer made from opaque colors, including the lightest values in the painting (Radiant Colors or a tint of Umber, Terre Verte or Portland Greys would be useful for this layer). Consider using Galkyd or Galkyd Lite thinned with approximately 10 - 20% Gamsol.
A final glaze layer that modifies the opaque colors and makes the surface very rich. Consider using Galkyd without thinning for an enamel-like finish or Galkyd Lite for lighter glazes. An opaque glaze layer is called a "scumble." Because of its transparency, Zinc White is the best white to create this effect. Also, pure hue "highlights" can be added to the top of the painting.
Basically, a good oil painting can be achieved by using the correct tools and methods.
Paintings built in this manner follow the "fat over lean" rule. what is " fat over lean" rule? I'll be posting about this rule after explaining more about indirect and direct painting. ALL PAINTING MEDIUMS ARE CONSIDERED FAT so use Galkyd thinned wsith Gamsol in the under layers and more painting medium in the upper layers.
For painters concerned about using oil rich colors, consider this visual key: Artists' grade oil paints that look shiny are fat. Artists' grade oil colors that look more matte are lean.
When using tints to build the middle layer, consider the layer lean because all Gamblin Artists' Whites are lean.
This simple system can be organized differently depending on whether painters prefer to build their paintings from dark to light (Leonardo) or light to dark (Rubens). Painters who prefer not to tone the ground will make brighter paintings by applying:
Thick opaque under painting as an initial layer
Thin transparent glazes to modify that under painting
Painters can also use the Indirect method by applying many glazes of only transparent colors over a drawing or a grisaille. The traditional drawing colors are medium brown (Umber), earth green (Terre Verte) or warm medium grey.
Direct Painting
This method of painting is used to make paintings in a single application. This is an opaque painting technique used by the Impressionists in their early work, the Fauves and the Abstract Expressionists. (But consider a painting made with transparent colors all in one layer a direct painting, too.) Direct painting relies on more planning because artists must consider form and color simultaneously.
A few guidelines:
Paint from light to dark
Vary brush marks from long stroke to short mark (like Cezanne's) to stippling, etc
Scrubbing in multiple directions
Scumbling with a near dry brush
Among the many choices, consider:
Paint the background to the foreground
Mix the colors primarily on the palette or on the canvas
Begin with the middle tones and gradually increase the contrast
For painting wet-into-wet, use mostly artists' grade oil colors with a small of amount Galkyd Slow Dry Painting Medium to increase the fluidity of the paints.
Alla prima is a method of direct painting in a single paint layer usually on a white ground.
Plein Air describes a direct technique of painting a landscape entirely out of doors.
Most painters use a combination of direct and indirect painting. For example, a landscape painting may look better when a glaze is applied to certain areas, such as the sky.
So, what is "fat over lean" rule?
The “fat over lean” rule allows you to build a painting that is flexible so over time there will be less cracking to your painting.
The under layers of a painting should be leaner than the upper layers. There are two different approaches to building paint layers following the “fat over lean” rule.
The first approach uses the same ratio of painting medium to oil color throughout a painting; however, the fat content of the painting medium is modified between each paint layer. In the initial layers, the oil medium (fat) is mixed with Gamsol (lean). As you add layers, increase the oil content of the medium by adding Galkyd oil painting mediums or a drying oil (Linseed, Stand or Poppy). The bottom layers will have more Gamsol and less oil. The top layers will have more oil and less Gamsol. The ratio of the painting medium mixture to oil colors remains the same.
The second approach uses varying amounts of the same painting medium throughout a painting. Since oil painting mediums are fat, when you add medium to oil color, the oil content increases. In the initial layers of a painting add a minimal amount of painting medium; then increase the amount of painting medium as you build up paint layers. The ratio of medium to paint increase as you continue painting.