| abstract |
A method of making an optically black surface having a low reflectance of electromagnetic radiation, especially in the solar spectrum, a relatively high heat resistance, and a relatively low amount of off-gassing, comprising the steps of (A) Milling the following mixture of ingredients for up to about 50 minutes: }Ingredient Amount (% by weight) }Alkali metal silicate 13-21 }Internal cure agent 2-10 }Black pigment 17-27 }Mica 0-3 }Water 50-70 } WHEREIN THE INTERNAL CURE AGENT IS SELECTED FROM THE GROUP CONSISTING OF CuO, Cu2S, NiO xNi2O3 and Co2O3. |