Color and Brightness of Cochineal and Brazilwood Red Natural Pigments

This paper focuses on describe the effect of the physical phase of linseed oil over the color and brightness of natural lakes manufactured with cochineal and Brazilwood. The lakes were made from scratch following existing recipes for the powder pigments and lately mixed with two different types of linseed oil: thickened boiled and cold-pressed raw. In order to investigate properties such as deposition on paper, color, and brightness, we measured their rheological properties to establish the relationship between the physical me- chanical properties of the lake pigments and the final results in a painting of each formula. Many pigments used in the food industry, pharmaceuticals, and even those in contact with animal consumption products have a synthetic origin. Therefore, understanding the process by which natural pigments are synthesized can help reduce health risks. This represents a promising area of research.