A very specific request!
DIN 53357 is a German standard for "Testing of plastics; determination of the density of plastics". Here's a draft paper based on the standard: din 53357 pdf
Determination of Density of Plastics according to DIN 53357 A very specific request
The density of the specimen is calculated using the formula above. The result should be expressed in units of g/cm³ or kg/m³. din 53357 pdf