The Oxidation Induction Period (OIT) is a time for measuring the autocatalytic oxidation reaction of a sample under high temperature (200 ° C) oxygen conditions, and is an index for evaluating the thermal degradation resistance of a material during molding, storage, welding, and use.
The drop point is the lowest temperature at which a certain fluidity is reached under specified conditions, expressed in °C (in degrees Celsius). The drop point is the temperature at which the grease changes from a semi-solid to a liquid state under standard conditions.
Cone penetration is an indicator of the consistency and hardness of a grease. It refers to the depth of the cone falling into the specimen under specified load, time and temperature conditions. Its unit is expressed in 0.1 mm. The greater the cone penetration value, the softer the grease.
The flash point is the lowest temperature at which a certain ignition source is used to cause vaporization of a liquid under specified test conditions. Flash fire is a phenomenon in which a short surface of a fire is generated when a sufficient vapor is generated on the surface of the liquid to form a flammable gas. The lowest temperature for flashing is called the flash point.