The main difference between a pure waterjet and an abrasive waterjet is the addition of abrasive material to the waterjet stream in an abrasive waterjet system.A pure waterjet, as its name suggests, uses only water to create a high-pressure jet of water that is capable of cutting through a variety of materials, including soft materials like foam and rubber, as well as harder materials like metal and stone. The water in a pure waterjet is pressurized to extreme levels, typically between 30,000 and 90,000 PSI, and then focused through a small nozzle to create a precise cutting stream. In contrast, an abrasive waterjet adds a fine abrasive material, such as garnet, to the waterjet stream to increase its cutting power and allow it to cut through harder materials like granite, ceramics, and hardened steel. The abrasive material is mixed with the water in a chamber before it enters the nozzle, and the resulting mix of water and abrasive is then focused through the nozzle to create a cutting stream that is capable of cutting through much thicker and harder materials than a pure waterjet. Overall, while both pure waterjets and abrasive waterjets are capable of cutting through a wide variety of materials, the addition of abrasive material in an abrasive waterjet system significantly increases its cutting power and allows it to cut through much harder and thicker materials.