The properties of the object for density, apparent density, bulk density, and bulk density are as follows:

Density, apparent density, bulk density, and bulk density are one of the basic characteristics of an object. The density of an object is closely related to the factors such as strength, impact, compactness, and abrasion resistance, and the characteristics related to density are known. Understand objects, study the beginning of objects

1. Density refers to the mass of a unit volume in an absolutely dense state.
2. The apparent density is the mass per unit volume of the material including closed porosity.
3. Bulk density refers to the volume of a material in its natural state, including the mass of a unit volume of a material body and its openings and closed porosity.
4. Bulk density refers to the mass per unit volume of a bulk or fibrous material in a stacked state.