Density

Smithers Pira can test the density of plastic films, cellular plastics and other non-absorbent materials using the appropriate international standards.

The density of plastic films is determined by placing test specimens in water and adding isopropanol (or other liquid if sample density > 1 kg/m3) until the plastic sample achieves a neutral buoyancy in the solution. 

The density of plastic films is tested to British standard and International standard ISO 1183.

The density of plastic and other non-absorbent materials such as glass in finished form can be determined by weighing a sample in air, and in a test liquid, using a balance and pan straddle.

Smithers Pira testing is made in accordance with British standard BS 2782:6 method 620A or ASTM D792.

The density of cellular plastics can be determined following British standard BS EN ISO 845, International standard ISO 845 or ASTM D1622.