| 摘要 |
<p>A process for preparing a silicon dioxide coating which comprises bringing a treating solution comprising a hydrosilicofluoric acid wherein silicon dioxide is in a supersaturated state into contact with a substrate, such as glass, to precipitate a silicon dioxide coating on the surface of the substrate, characterized in that a means for preventing the separation of the silicon component from the treating solution is provided. This process brings about neither a deterioration of the working atmosphere nor a lowering in the concentration of the solution.</p> |
