About Glass Bottle 5.0-Hardness of jar glass

The hardness of glass is very high, when the use is not easy to scratch and scratch the general sodium calcium glass vickers hardness (HV) is 400~480MPa, and the hardness of plastic are relatively low, easy to scratch, such as polyvinyl chloride (PVC) HV is 10~15MPa, thermosetting polyester (PET) is 10~21MPa, polyethylene (PE) is 5~8MPa, polypropylene (PP) is 6~11MPa.