A TA Instruments Q800 Dynamic Mechanical Thermal Analyser (DMTA) in compression mode was used to test the compressive behaviour of the cocoons. Cocoons were cut into circular samples with a diameter of 3.5 mm and weighed before tests. A metal plate was used to apply a compressive force on the sample at a speed of 3 N/min. The tests automatically stopped when the compressive stress reached 1.5 MPa, and the thicknesses of the samples were defined at this compressive stress for further calculations. The data of force vs. distance of the plate were recorded for analysis. Three samples from each cocoon were tested. The density of the cocoons was calculated from the weight and the defined thickness of the samples.