Servaes combined this technique with a use of earth colors to create a gloomy tone in many of his works.
They consisted of red, brown or black earth color applied with the decor.
An imprimatura is usually made with an earth color, such as raw sienna, and is often diluted with turpentine.
This was a natural earth color composed of over ninety percent organic matter, such as soil and peat.
The most common paints were red ochre, red lead, soot, calcium carbonate, and other earth colours, which were bound with fat and water.
Some of the reds are mixed with earth colours not susceptible to the effects of light, and have thus survived close to their original appearance.
The pieces are decorated with earth colors generally with an overall tone of cinnamon to reddish after firing.
The artist used mainly earth colors, sometimes enlivened with stronger accents.
