The Theory and Practice of Enamelling on Iron and Steel; With Historical Notes on the Use of Enamel

The Theory and Practice of Enamelling on Iron and Steel; With Historical Notes on the Use of Enamel

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 edition. Excerpt: ...been severely reprimanded. Finely ground enamels have a brighter lustre than those more coarse; yet in spite of this the enamels are not powdered too finely, since they acquire a soapy, slimy feel and are hard to use, owing to the formation of lumps. Ground and blue must be somewhat more coarsegrained than white. In cases where the utensil is only to be coated once with white enamel, it must be ground correspondingly coarser than a so-called second white, which is used for the second covering. The specific gravity of the enamels, i.e. the weight of a cubic centimetre, amounts to: --For white, calculated without included water..... 2'8 The same reckoned+ 30 per cent. water..... 1.8 For ground-enamels, calculated without included water.... 2.04 The same reckoned+30 per cent. water..... 1'55 According to the ordinary formula, '0 x s=g, i.e. the product of volume and specific gravity of a body is equal to its weight. The weight of a volume of the enamel, or vice 'uersa, may quickly be calculated by using the above specific gravities. ' E.g. a vessel contains 45 litres of white enamel powder, including water, and therefore ready for use. This 45 l. weighs, therefore, 45 x 1.8 5 81 kg. The same vessel containing 45 l. ground-enamel will only weigh 70 kg., since 45 x 1. 5 5= 70 kg. The specific gravity of white enamel is higher than that of the other enamels, owing to the addition of stannic oxide, and approaches, consistent with similarity in character, the specific gravity of glass, which varies from 2.4-3. The cost of fusion for 100 kg. enamel, from the ratios of the amounts melted, will be determined by the sum of the following variables: crucibles for melting, fire-proof material, boxes for holding the enamel, coal for the furnace, shovels more

Product details

  • Paperback | 30 pages
  • 189 x 246 x 2mm | 73g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236619099
  • 9781236619099