These will restore the bright vermilion hue, and likewise give a greater amount of density or covering power to the colour.
Fineness of grinding, uniformity of color in respect to its coloring and covering power, and brilliancy, are valued essentials.
Easy working, without brush marks, is a paramount virtue, regardless of the opacity or covering power of the black.
The sample which departs the least from its own color has the best body or covering power.
Hence, the covering power of a color can never be accepted as a safe guide to direct the thinning of said color.