Write a 70-word paragraph on how to test the quality of sandwich panels

Sandwich panels are commonly used in construction and transportation industries due to their lightweight and insulating properties. To test the quality of sandwich panels, several factors need to be considered. Firstly, the core material should be checked for its density, strength, and thickness. Secondly, the bonding between the core and the facings should be tested for its durability and adhesion. Thirdly, the sandwich panel should be subjected to compression, flexure, and impact tests to evaluate its strength and stiffness. Finally, the thermal and acoustic insulation properties of the sandwich panel should be measured using appropriate testing methods