Green Diamond Sand is a crushed nickel slag deposit that is processed; ground and screened. With Green Diamond, a finer sand may be used due to increased permeability, and thermal expansion is much lower than silica, therefore reducing expansion defects resulting in a smoother casting. There are also significant health advantages with Green Diamond Sand.

Greensand has a black color due to the burning of the sand by the hot metal. The term "greensand" refers to the green strength property that the sand "stands up" by itself and does not fall over or get hard.

The optimum mixing procedures of Greensand Molding Sand require a Muller, which is the machine used in the industry to thoroughly mix and condition molding sand. With the addition of water, the rotation and grinding of its heavy wheels or rollers activate the clay and additives in the molding sand. Using a muller is essential in achieving uniformity and consistency in the sand mixture, which is crucial for producing accurate and defect-free castings.

*If a muller is not available the recommendation is to buy premulled sand or oil activated Petrobond MX and discard the burnt sand.

Unfortunately, there is not a definite answer to the question! The amount of water varies with each foundry's environment. Generally, a starting point is 3% moisture. This additive is a "necessary evil"; it is required to hold the molds together but also can cause several other problems. Water is the most important additive in a greensand system and must be controlled consistently.

Permeability refers to the ability of a sand mold or core to allow gases (such as air and steam) to pass through its structure during the casting process. Maintaining the right level of permeability in molds and cores is vital for successful casting operations, helping to prevent defects and ensuring high-quality end products.

Collapsibility refers to the ability of a mold or core to break down or disintegrate easily after the molten metal has solidified and cooled. It is essential, as it allows the casting to be removed from the mold without causing damage to the casting itself or leaving behind residues.

The Baume Gauge is nothing more than a hydrometer that is designed to measure the specific gravity of pure liquids in degrees of baume, which is graduated from 0 to 100. The specific gravity of water, which is 1.00, is set at 0 degrees baume. These numbers are used to determine the adequate viscosity for suggested applications of core and mold wash.

This sand consists of a mulled mixture of fine sand, oil, Petrobond binder, and a small amount of catalyst. Petrobond MX sand contains oil instead of water and needs much less venting. The amount and type of oil used creates considerably less gas than is created in ordinary water sands. This permits the use of much finer sands with lower permeability than allowable with water sand molds. This means precise castings using only ordinary foundry equipment. In practice, the standard mixture using sand with a GFN of 90 has a permeability of only 15. Nevertheless, this is adequate for non-ferrous alloys because of much lower gas evolution.

As a foundry aggregate, Green Diamond Sand is noted for its high fusion point, low uniform thermal expansion, and its remarkable ability to resist fracture from thermal shock. It is popular and known for producing excellent non-ferrous castings. This sand works well in iron, manganese, and stainless steel.

The angular grain acts to control the rammed or squeezed density of the mold. This feature combined with the favorable coefficient of thermal expansion, usually permits the elimination of organic filler from molding sand formulations. This angular grain also allows use of finer sands while retaining permeability.

Another advantage of using Green Diamond Sand is its industrial hygiene characteristics. Medical research indicates that this sand will not cause Silicosis. This sand is available in several grades and packaged in 3000# sacks or 50# bags.