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The Term mineral colors describes paint coats with mineral binding agents. Two relevant mineral binders play a role in the field of colors: Lime and silicate. Under influence of carbon dioxide, lime-based binders carbonate, and water silicate-based binders solidify. Together they form calcium silicate hydrates.〔Kurt Schönburg: ''Historische Beschichtungstechniken – erhalten und bewahren''. vb Verlag Bauwesen, Berlin 2002, ISBN 3-345-00796-7, S. 43f.〕 Lime paints (aside of Fresco-technique) are only moderately weather resistant, so people apply them primarily in monument preservation. Mineral colors are commonly understood to be silicate paints. These paints use potassium water glass as binder. They are also called water glass paints or Keimfarben (after the inventor). Mineral silicate paint coats are considered durable and weather resistant. Lifetimes exceeding a hundred years are possible. The city hall in Schwyz and "Gasthaus Weißer Adler" in Stein am Rhein (both in Switzerland) received their coats of mineral paint in 1891, and facades in Oslo from 1895 or in Traunstein, Germany from 1891. == History == Alchemists on their pursuit of the "Philosophers Stone" (to manufacture gold) found glassy shimmering pearls in fireplaces. Sand mixed with potash and heat coalesced into pearls of water glass. Small round panes of water glass were first industrially manufactured for used as windows in the 19th century by Van Baerle in Gernsheim and Johann Gottfried Dingler in Augsburg. Johann Nepomuk von Fuchs made the first attempts to create paints with water glass. Around 1850, the painters Kaulbach and Schlotthauer applied facade paints of the Pinakothek in Munich. Due to use of earth pigments, which cannot be silicated, the paintings washed out of the water glass. In 1878, the craftsman and researcher Adolf Wilhelm Keim patented ''mineral paints''. Since then, they have been manufactured by the successor company Keimfarben in Diedorf near Augsburg. Keim depended on V. van Baerle as the source of water glass. Keim also attempted to manufacture silicate paints himself. His experiments took years to mature, but he finally achieved good results. The Silinwerk van Baerle in Gernsheim near the Rhine river and Keimfarben in Diedorf near Augsburg are well-known manufacturers.〔Kurt Wehlte: ''Werkstoffe und Techniken der Malerei.'' Band III, Urania Verlag, 2001, ISBN 3332016652, S. 452.〕 The impetus for Keim's intense research originated from King Ludwig I. of Bavaria. The art-minded monarch was so impressed by the colorful lime frescoes in northern Italy that he desired to experience such artwork in his own kingdom Bavaria. But the weather north of the alps - known to be significantly more harsh - destroyed the artful paintings within short time. Therefore he issued an order to Bavarian science to develop paint with the appearance of lime but greater durability. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Silicate mineral paint」の詳細全文を読む スポンサード リンク
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