GB190015830A - Improvements in and relating to the Manufacture of Imitation Marble and the like. - Google Patents

Abstract

15,830. Tuckwell, J. Sept. 6. Facing-tiles; slabs &c.-Relates to the manufacture of slabs, tiles, mouldings, &c. of imitation marble, granite, or other stone. The imitation stone is of a fireproof, waterproof, and ornamental character. Keene's marble cement, white silver sand, ground alum, and, in some cases, litharge, are mixed dry and formed into a thin paste with water. Parian cement is sometimes added. Slabs or tiles are cast from the paste in shallow moulds, of which the bottom surface is of glass or polished metal. When plain colours are required, the slabs &c. after removal from the moulds are coated with enamel paint, stoved at 155‹ F., polished with rottenstone or Tripoli powder, coated with spar or other varnish, stoved again, and finally polished while warm with a composition of beeswax, turpentine and precipitated chalk. The backs of the tiles &c. may be coated with boiled linseed or litharge oil, to prevent damp. Before polishing, the slabs may be decorated in suitable colours, varnished, stoved, and rubbed down with rottenstone. To imitate marble, granite, &c., the requisite graining may be applied in oil or watercolours to the surface of the bottom of the mould. Preferably, however, the slabs &c. are coated with paint, stoved at 155‹ F., marbled or grained in colours, stoved at 250‹, varnished, stoved at 155‹, rubbed with rottenstone, and polished with the aforesaid beeswax composition.