Density

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. Pira testing is in accordance with British standard,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. 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.

Contact the Expert

  • Mark is the materials laboratory manager with twenty years experience in paper and board research and testing, covering the full paper production cycle from pulp to converting and end use.

    Mark Taylor
    Mark Taylor

    Laboratory Manager

    Pira International

    +44 (0)1372 802147

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