| 摘要 |
It consists in applying, onto a base sheet of tempered glass with a high level of thermal resistance and mechanical strength, and on its lower surface: 1 - a coat, no more than 2 mm thick, of a special adhesive rubber mixture with an adherence of 30 kg per cm2 at one day and of 40 kg per cm2 at three days, with a colour mixture of between 20 and 50% powder composed of 2/5 parts of white marble and 3/5 parts of extremely fine granite rock sand, with between 10 and 30% water, all blended (kneaded) and applied, setting in 8 hours; 2 - to the first coat in paragraph 1 is applied a second, 1-mm coat composed of two parts of fine granite sand and one part of adhesive special rubber, with a setting time of 24 hours; 3 - to the second coat in paragraph 2 is applied a third coat, less than 1 mm thick, of adhesive special rubber without any mixing, of great purity and impermeability, a time of between 2 and 3 days being required for its drying and setting.
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