Enamels for Sheet Iron and Steel

Enamels for Sheet Iron and Steel

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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. 1920 edition. Excerpt: ...likely to give the desired result, but the Florida clay was included since it had been used for this purpose on different occasions. The clays selected were: No. i. Kentucky ball clay. No. 2. Tennessee ball clay, J. K. Porter No. EX. No. 3. German Vallender clay. No. 4. Georgia clay. No. 5. Florida clay. No. 6. English ball clay, M. & M. No. 7. A clay supplied to the trade, resembling Florida clay, included in part of the tests. A series of experiments was made, treating the clays with electrolytes, to determine their properties as compared with the Vallender clay. In all the clays the results showed some similarity to the German clay, but on the whole they may be placed in the order: Nos. 2, 5, 1 and 4, 6, as regards their resemblance to No. 3. Experiments were next made to determine how the clays would act when used as the agent for floating the enamels. There are five factors which greatly influence the floating of frits in enamel or glaze slips: (1) Size of grain of the frit; (2) specific gravity of the frit; (3) concentration of frit in the slip; (4) viscosity of the floating medium; (5) amount of the floating medium. 1. Fine grinding makes the frit more easy to float, but enamelers dare not grind too finely, because of difficulty in getting a uniform coating on the ware. Ground coat enamels especially must be coarse, not finer than 100 mesh, and, better, 80 mesh. 2. Lead enamels would, of course, be more difficult to float than lighter ones, but lead is seldom used in enamels for sheet iron. However, all frits are relatively high in specific gravity as compared with clays and therefore settle more readily. 3. Settling is easily prevented by making the slip thick, approaching a paste, but in order to apply them by dipping or spraying, ..show more

Product details

  • Paperback | 30 pages
  • 184 x 242 x 4mm | 80g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236622677
  • 9781236622679