Density

The density of paint will depend on their ingredients in the paint. Density is also known as specific gravity or mass per unit volume.

The more ingredients/particles in paint the more mass per unit of volume. This is called density (S.G) can be written as g/cm3. The reference substance for liquids is nearly always water. It is important to specify temperature for both the sample and reference. To find the density of a paint you need to establish the weight of the product. For these several instruments are available, pyknometers, immersion bodies, densimeters and weighing scales.

A Pyknometer in combination with a balance is the simplest way to establise the density or SG in g/cm3 of a paint.

The Immersion Ball types in combination with a balance determine the density of a paint as method based on the ‘Archimedes’ principle. The upward force caused by immersing the plummet into the liquid is read from a laboratory balance and expressed in grams/ml.

Electronic versions of Densimeters are cost efficient instruments for calculating the specific gravity with a high resolution level. The systems are suitable for checking liquids as well as other non-metal materials. The value is displayed automatically after the elapsed time.