not keep the ice from melting, but the appliance will recycle the water to make more ice. Once the storage tray is full, the system will turn off automatically. Built-in and freestanding icemakers Built-in icemakers are engineered to fit under a kitchen or bar counter, but they can be used as freestanding units. Some produce crescent-shaped ice like the ice from a freezer icemaker; the ice is cloudy and opaque instead of clear, because the water is frozen faster than in others which are clear cube icemakers. In the process, tiny air bubbles get trapped, causing the cloudy appearance of the ice. However, most under-counter ice makers are clear ice makers in which the ice is missing the air bubbles, and therefore the ice is clear and melts much slower. Industrial icemakers Commercial ice makers improve the quality of ice by using moving water. The water is run down a high nickel content stainless steel evaporator. The surface must be below freezing. Salt water requires lower temperatures to freeze and will last longer. Generally used to package seafood products. Air and undissolved solids will be washed away to such an extent that in horizontal evaporator machines the water has 98% of the solids removed, resulting in very hard, virtually pure, clear ice. In vertical evaporators the ice is softer, more so if there are actual individual cube cells. Commercial ice machines can make different sizes of ice like flakes, crushed, cubes, octagons, and tubes. When the sheet of ice on the cold surface reaches the desired thickness, the sheet is slid down onto a grid of wires, where the sheet's weight causes it to be broken into the desired shapes, after which it falls into a storage bin. Flake ice machine Flake ice is made of the mixture of brine and water (max salt per ton of water), in some cases can be directly made from brine water. Thickness between , irregular shape with diameters from . The evaporator of the flake ice machine is a vertically placed drum-shaped stainless steel container, equipped with a rotating blade that spins and scratches the ice off the inner wall of the drum. When operating, the principal shaft and blade spin anti-clockwise pushed by the reducer. Water is sprayed down from the sprinkler; ice is formed from the water brine on the inner wall. The water tray at the bottom catches the cold