Cobra is a genuine oil paint. The paint is made on the basis of drying oils and does not contain any water. An unusual property of this oil, however, is that it can be mixed with water. The paint can be used in all the usual oil paint techniques. Very high-quality pigments are used for this product range. All colours (70) have the highest degree of lightfastness +++ (at least 100 years lightfast under museum conditions).
Cobra oil colours carry the label of an Artist quality. It is pleasant working with Cobra water mixable oil colours as you do not have to use any white spirit. Brushes and palette knives can be cleaned simply using soap and water.
To allow oil and water to mix, an additive is needed. This additive helps to form a stable blend of small oil droplets in water. This blend is called an emulsion. The additive is known as an emulsifier. Artists have actually been using similar techniques for a long time. Before oil paint even existed artists worked with casein tempera and egg tempera paint. These two types of paints use natural emulsifiers. Casein is itself an emulsifier and in egg tempera use is made of the emulsifier that is already present in the egg yolk.
With Cobra water mixable oil colours you can paint in the same way as with traditional oil paints. When painting with traditional oil paints, the harmful solvents white spirit or turpentine are used in the underlayers. With Cobra oil colours you can use water instead. Water replaces white spirit. In this way you can work without solvents, so that your working space is kept free of that unpleasant odour of solvents.
Yes, Cobra oil colours can be used for all oil painting techniques. - Painting alla prima (wet-into-wet painting) - Layered painting - Glazing - Impasto painting.
A number of factors determine whether paint can be referred to as Artists' Quality.
Firstly, the amount of pigment is important. Artist Quality contains a lot of pigment. The user therefore gets a great deal of colour.
Secondly, an artist has a quality product range with a wide choice of colours composed of exclusive pigments.
Lastly, the fineness is important. The ingredients in the paint must be distributed as well as possible. This dispersal (pulverization, rubbing) occurs in a triple-roll mill. The raw materials that are mixed a little in the pre-mixer are led through a mill a number of times until the paint has the desired fineness.
Working with Cobra has the following advantages:
Technically-speaking the difference lies in the binder. With alkyd paints this is an alkyd resin dissolved in white spirit. With Cobra water mixable oil colours this binder consists of drying oils. Its use results in the following differences: