The Digital Shore Durometer Model: LD-A from Centmass, available at Prevest Research Institute is used to measure shore- A type hardness of materials similar to soft plastic, rubber, etc. to characterize materials such as impression or polymer based dental products. This instrument is having a measuring range: 0-100HA with a resolving power: 0.2HA with a testing inaccuracy: within 20-90 HA and inaccuracy level ≤±0.6HA