K-value is simply shorthand for thermal conductivity,U-value, known officially as thermal transmittance and R-value, know as thermal resistance,is used to reflect the ability to resist heat flow by thermal insulating materials.

Vacuum insulated glass is developed based on the principle of Dewar flask (i.e. vacuum flask), where the vacuum layer is used to reduce gas conduction and convection to achieve features such as heat insulation, energy saving and noise reduction,etc.

LandVac Vacuum Insulated Glass energy saving Series with Low-E glass offering better energy saving performance, is the ideal solution for buildings in line with energy-saving and emission-reduction policies.

​In August 2021, with the acceptance and commissioning of the 5th LandGlass’ glass tempering furnace at Jin Jing's production base in Penang, Malaysia, the production base has become the largest photovoltaic glass production base in Southeast Asia.

Physicist Torricelli proved the presence of vacuum and atmospheric pressure in natural space.To commemorate Torricelli in scientific discoveries and contributions, the torr, a conventional unit of pressure used in vacuum measurements, is named after him.