Density or specific gravity refers to the weight of one liter of enamel slip, measured in kilograms. The density of enamel slip mainly comes from the sum of the densities of the individual units that make up the enamel slip. The average density of enamel frit, quartz and clay is 2.6 g/cubic centimeter, some enamel frits have higher density and some are lower. The enamel supplier will provide this information. The density of water is 1.0 g/cm², and the density of colored oxides varies greatly, some can be as high as 4 g/cm². The density of a small amount of retention agent can be ignored when calculating the enamel density.

In order to predict the density of the enamel slip, the weight of each component of the enamel slip can be divided by its volume, and then added up. The grinding fineness of the enamel slip has no effect on its density.

Enamel frit manufacturer have relevant instructions for the mass-produced enamel frit. The specific gravity of the enamel slip generally has a clear range of requirements, because the specified enamel slip specific gravity can only be achieved by strictly following the grinding and mixing ratio. The firing temperature is controlled reasonably. Under the conditions, the best grinding and mixing ratio can ensure the firing effect of enamel products.