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Research by S.J. Leach and G.L. Walker in the mid-1960s expanded on traditional coal waterjet cutting to determine the ideal nozzle shape for high-pressure waterjet cutting of stone, [8] and Norman Franz in the late 1960s focused on waterjet cutting of soft materials by dissolving long-chain polymers in the water to improve the cohesiveness of ...
The basic diamond cutting process includes these steps; planning, cleaving or sawing, bruting, polishing, and final inspection. [6] A simplified round brilliant cut process includes the following stages: Planning – Modern day planning of a diamond is done using computer software. Marking – Outlining the best possible shape and cut of the ...
The diamond cut planning stage is a complex process that requires the cutter to work with unique rough stones. Very often, the location of the inclusions in a rough stone will determine the type of shape to which a diamond may be cut.
Polski: Cięcie wodno-ścierne (water jet cutting): 1 - dopływ wody pod wysokim ciśnieniem, 2 - kamień szlachetny (rubin lub diament), 3 - materiał ścierny (granat / garnet), 4 - tuleja mieszająca, 5 - osłona, 6 - strumień tnący, 7 - cięty materiał
These diamond saws and good jewelry lathes enabled the development of modern diamond cutting and diamond cuts, chief among them the round brilliant cut. In 1919, Marcel Tolkowsky analyzed this cut: his calculations took both brilliance (the amount of white light reflected) and fire into consideration, creating a delicate balance between the two ...
An example of this is water jet cutting. Water jet cutting involves pressurized water over 620 MPa (90,000 psi) and can cut metal and have a finished product. This process is called cold cutting, which eliminates the damage caused by a heat-affected zone, as opposed to laser and plasma cutting.
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Even with modern techniques, the cutting and polishing of a diamond crystal always results in a dramatic loss of weight; rarely is this loss less than 50%. The round brilliant cut is preferred when the crystal is an octahedron , as often two stones may be cut from one such crystal.