This section is from the book "Modern Shop Practice", by Howard Monroe Raymond. Also available from Amazon: Modern Shop Practice.
Before taking up the making of molds, let us consider briefly the materials used, where they are obtained, and what is their particular service in the mold. Also we shall describe the principal tools used by the molder in working up these materials into molds.
There are three general classes of materials for molding kept in stock in the foundry, as tabulated herewith:
Sands | Facings | Miscellaneous |
Molding sands | Graphite | |
Light | Charcoal | Parting dust |
Medium | Sea coal | Burnt sand |
Strong | Charcoal | |
Free sands | Partainol | |
Sharp or Fire | Core binders | |
Beach sand |
 
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