Method for Providing Marble and other Stones or Cement with Deeply Penetrating Designs in Colour.

摘要

15,929. Hippe, E. E., and Holm, T. Aug. 7. Painting and varnishing.-Relates to the production of coloured designs on marble, stone, cement, &c. by a process which enables sharp contour lines to be preserved while admitting of a deep penetration of the colour into the marble &c., so that the surface can be ground and polished, The contour lines are drawn on the surface with a pen or a fine brush moistened with a water-glass solution or a similar fluid capable of closing the pores. This solution is coloured black for the sake of distinctness. The line is painted several times over so as to penetrate deeply into the stone, which may be heated to facilitate the penetration. Coloured fluids which wi!! not mix, such as water, ammonia-water, glycerine, or spirits of wine on the one hand, and oil, turpentine, petroleum, ether, wax, resin, sulphur, &c. on the other are applied simultaneously on the two sides of the contour line. The fluids limit each other's expansion below the line, which thus retains its sharpness within the body of the marble. If the pattern is applied on both sides of a thin slab, it will extend right through it. One of the fluids may contain colouring material, and the other be uncoloured. If the latter is petroleum, benzine, ether, &c., it can be eliminated by heating the marble, or by means of suitable solvent, and the uncoloured part may then be coloured separately. When the colour is dissolved in wax, and applied to hot marble, the penetration can be increased by the use of a hot stamp or templet. The marble may be coloured throughout, portions being then protected by wax, petroleum, or an alcoholic solution of resin while a further colour is applied. One colour may be sub-coloured with another forced into the marble from the sides &c. Suction may be applied to the opposite side of a slab to increase penetration. A framework of metal strips curved to correspond with the contour lines on the marble can be used to facilitate the application of the colours, which are applied in the spaces enclosed by the strips.