EFCO manufactures architectural windows, curtain walls, storefronts, and entry systems designed for commercial construction needs, sold through independent sales representatives across the United States.
Short History of Black Pigments. Carbon black was the first black. This dull black is the easiest to manufacture because it is made of charcoal. Another black is vine black, which is traditionally made by charring desiccated grape vines and stems, which produce beautiful bluish blacks. Bone black, made of burnt bones from prehistoric times, is the deepest available black.
Black and white can also not be made by mixing together other colors, but as they aren't used in color mixing to create colors, they get excluded from color mixing theory. If you add white to a color you lighten it and if you add black you darken it (though some painters don't use black at all, see.