A manual of dental mechanics.

  • Coles, Oakley, 1845-1906
Date:
1873
Catalogue details

Licence: Public Domain Mark

Credit: A manual of dental mechanics. Source: Wellcome Collection.

    17/328 page 13
    Xlll SECTION IV CASTING IN PLASTER OF PARIS AND METAL PAGE Casting Model in Plaster from an Impression taken with. any Plastic Material . . . . .29 Preparation of the Impression, Strengthening of Teeth, Use of Galvanised Iron Wire and Wooden Pegs . 29 Shape of Model for Metal Work . . . .30 » ,, Vulcanite Work . . .30 Removal of Impression from Model . . .31 By means of Hot Water or Dry Heat . . .31 Casting a Model from a Plaster Impression . . 31 Preparation of the Surface of the Plaster . . .32 Separation of the Impression from the Model . 32, 33 Trimming-up of Plaster Models . . . .33 Preparation of Plaster Models for Gold Work . . 33 Casting in Metal ...... Description of Casting Sand to be used . . .34 Mode of Moistening with Oil or Water . . . 34 Coating Model with French Chalk . . . .35 Use of Iron Casting Ring . . . . .35 Pouring of Molten Metal into Mould . . .35 Hawes’ Casting Ring for Undercut Models . . 36 Franklin’s mode of Casting Dies and Counter-dies . 37 Counter-die obtained from a Ladleful of Lead . . 40 „ Casting Ring and Sandbank 41 „ Impression of Plaster Model dipped in Lead . . . . . .41 Casting Model from Lead Counter-die . . . 42 Materials for Metallic Castings . . . .42 Composition of various Fusible Metals . . . 42 Professor Austen’s Table of Fusible Metals . . 43 Annealing Dies and Counter-dies . . . .43
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