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Many surprisingly difficult jobs are being done with disappearing presswork compounds (sometimes called “vanishing oils” or “evaporatives”). Such jobs include drawing, forming, punching, and perforating. Among the specific metals being worked are cold-rolled steel, aluminum, vinyl coated stock, pre-painted stock, galvanized steel and copper alloys.
Disappearance of these compounds depends upon evaporation, and application is important. Application can often be controlled so that parts come off the press dry. However, when parts nest (so that evaporation cannot occur), a light film can be expected to disappear between 20 seconds and 1 hour of time. Evaporation depends on the specific compound used, the amount applied, temperature, humidity, and volume of air movement.
Ideally, the dies and punches should be sprayed using a JET-SET® airless spray system. Spray should be just enough to wet the working surfaces. Drip or roller applications are also satisfactory.
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