| 摘要 |
<p>1290844 Ceramic tiles CERTELS Ltd 7 Oct 1969 [11 Oct 1968] 48438/68 Headings C1H and C1J Artificial stone tiles are obtained by forming a mix of particles graded to allow green tiles to be formed with low void spaces under a pressure of ¢ to 5 tons/sq. inch, the mix comprising granite, a green strength binder, 1-40% Al 2 O 3 and/or 1-50% kaolin, and optionally Na 2 SiO 3 , quartz, felspar and a flux, e.g. NaCl for felspar, pressing to dense tiles, and firing under such conditions as to cause only surface fusion of the felspar content (including the felspar content of the granite).</p> |
