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Evaporative-pattern casting is a type of casting process that uses a pattern made from a material that will evaporate when the molten metal is poured into the molding cavity. The most common evaporative-pattern material used is polystyrene foam. [1] The two major evaporative-pattern casting processes are: [1] Lost-foam casting; Full-mold casting
Microfoam may also be used in a steamer (a "coffee-free" cappuccino), though this can instead be made with dry foam. As it requires a skilled barista to produce microfoam (especially when used for latte art), it is a sign of attention to quality, and a defining characteristic of the third wave of coffee .
Full-mold casting is an evaporative-pattern casting process which is a combination of sand casting and lost-foam casting. It uses an expanded polystyrene foam pattern which is then surrounded by sand, much like sand casting. The metal is then poured directly into the mold, which vaporizes the foam upon contact. Full-mold casting
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The final pattern is approximately 97.5% air and 2.5% polystyrene. Pre-made pouring basins, runners, and risers can be hot glued to the pattern to finish it. [1] The foam pattern does not need to be coated with investment if high detail is not needed, simply putting the foam pattern in a box, filling with sand and vibrating will do.
To use it in place of fresh milk, simply open a can and mix it with an equal amount of water, then replace the milk in your recipe measure-for-measure. 4. Sweetened Condensed Milk
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In cuisine, foam is a gelled or stabilized liquid in which air is suspended. Foams have been present in many forms over the history of cooking, such as whipped cream , meringue and mousse . In these cases, the incorporation of air, or another gas, creates a lighter texture and a different mouthfeel .