Another variety of vacuum degassing is manual vacuum casting. Bubble-free casting is mandatory for high-value and heavily loaded components. With manual vacuum casting, the parts are cast at atmospheric pressure. Next, they are exposed to gas in a vacuum chamber. This makes premium-quality bubble-free manual casting possible. This is of advantage above all for small series production as well as for research and development purposes. With manual vacuum casting, running suitable pressure ramps is a precondition for achieving optimum results. It is also possible to use special casting compounds not suitable for standard casting systems.