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.
Phosphorescence - Materials. 1  Common pigments used in phosphorescent materials include zinc sulfide and strontium aluminate. 2  Phosphorescent pigments â zinc sulfide vs. strontium aluminate. 3  left: Zinc Sulfide right: Strontium Aluminate. 4  pigments in the dark. 5  pigments in the dark after 4 min. 6  Phosphorescent pigments red and blue.