Very often a pigment can be a group of related compounds rather than one specific chemical. I have not included detailed chemical descriptions or analyses, but only basic information that should help you to find further information. I have included references designated with Ref where further information can be attained. Adulterants, extenders and other additives may be added to artistic paints to improve the paint rheology, transparency, andor drying time. Often inert pigments, extenders and fillers are added to the color pigments in student grade paints or to modify paint pigments with overly strong tinting strength, i. Phthalocyanine Blues and Greens. These extra ingredients are rarely listed of the label. Color Description Key Top Page TopThis is a general attempt to explain the hue in plain English. The perception of color is as individual as the the people viewing it and any such description can not be completely accurate, but merely give a general idea of the what color looks like to the average person. Many pigments have a range of shades and hues. This range in hues can be due to many things such as different manufacturing processes, exact chemical composition and crystal shape. In most cases, i have not used any of the attempted means of standardizing color descriptions for this such as the Munsell system, but where the pigment is included in the Color Index International Pigments and Solvent Dyes The Society of Dyers and Colourists, third edition 1. I have used that description, when there is no color hue description in the Color Index, I have used other reference sources in particularly manufacturer or supplier literature. Effects of long term light exposure are given when known, this may allow an artist to anticipate color changes and possibly use them as an advantage. These effects are all relative to the pigments inherent light fastness and may take decades or even centuries in museum conditions to be visible. Fades Becomes more Transparent. Lightens Loses chroma but maintains. Download Leon Schuster Videos Youtube. Bs En 12390 8 Pdf To Word© 2017