Abstract: A method of pressure processing a material comprises placing the material in a pressure chamber of an enclosed housing, said chamber providing a pressurizing medium and an inflatable resilient pouch, said pouch then being inflated with a pressure agent such that pressure is applied by the surface of the pouch to the pressurizing medium, said medium in turn applying pressure to the material for a sufficient duration and degree to process the material.

Abstract: A method of manufacturing colored ice comprises dissolving coloring agent in source liquid to form colored source liquid, placing the colored source liquid in a pressure resistant housing, said housing comprising a pressure regulating means and then while freezing the colored source liquid, using the pressure regulating means to vary levels of direct high and low pressure to the colored source liquid such that at high pressure level intervals, there is contact between the pressure regulating means and the surface of the colored source liquid.