| 摘要 |
<p>Soap shows well-defined zones of different colours which are in the form of veins and give a marbled effect, which is maintained throughout the cake while it is being used. Different batches of soap are prepd., each of a different colour; these are cut into fragments of uniform dimensions and mixed together in fixed proportions of each colour in an extruder, having >=2 cylinders. Pieces of e.g. white, yellow and blue soap are fed into the hopper and a mass of multicoloured soap forms in the first cylinder; this is passed through a circular plate into the second cylinder. It receives a further mixing and a degree of compression in the extension to the cylinder and the mass is extruded in the form of a bar, its section being determined by the shape of the outlet. The multicoloured bar is cut into pieces which are then pressed into the usual toilet cakes. These have a pleasing appearance which is retained until the soap is used up.</p> |
