Low Emissivity Glass is a member of the coated glass family coated with one or more layers of metal or compound films on the quality float glass by using magnetic sputtering method. It has low thermal conductivity and high light transmittance, ensuring visible light transmittance and reducing light pollution based on prevention of heat losses.

Online LOW-E Coated Glass is a new-type energy efficient glass features in high reflectivity of far infrared heat radiation. Online LOW-E coated glass is produced by pyrolyzing coating material continuously under high temperature through CVD and MOCVD coating technology so as to deposit them on glass substrate surface moving inside a tin bath and black-out furnace. As the glass is coated online continuously under high temperature without extra heating, cleaning or drying process, it can be manufactured in large scale with low cost.

Off-line LOW-E Coated Glass is a highly efficient energy saving product obtained through the use of the Magnetron Sputter Vacuum Deposition (MSVD) method where multiple layers of metal or nonmetal coats are applied on the surface of a top quality float glass substrate.


  • High efficiency in energy saving and environment production.
  • Wonderful performance in visible light transmission.
  • Stable chemical performance.
  • Stable performance in thermal processing.
  • Stable mechanical performance for solid coat, high abrasion and scratch resistance.

LOW-E Terminology.

Coating Types: Online Hard Coating and Offline Soft Coating Offline Low-E Glass Types: Single silver high transmittance, Single silver high shading, and Double silver, etc.

With LOW-E, solar selective LOW-E, hard-coat, soft-coat, sputtered, and pyrolytic terminology to deal with, you need the facts on LOW-E.


CVD, or Chemical Vapor Deposition, is one of two main technologies used to manufacture Low Emissivity glass. In the CVD process, vapor directed to the hot glass surface reacts to form a ceramic coating. The resulting LOW-E
product is often referred to as "hard coat". Learn more about CVD...


Emissivity refers to the ability of a surface to absorb or reflect heat. An energy efficient glazing technology, Low Emissivity glass is a poor absorber of heat!

Hard Coat

Also known as "pyrolytic", hard coat refers to LOW-E glass manufactured via the CVD process. Because the coating is covalently bonded to the glass, hard coat LOW-Eis extremely durable.


MSVD, or Magnetron Sputterering Vacuum Deposition (also known as "sputtering"), is one of two main technologies used to manufacture Low Emissivity glass. In MSVD, a metal or ceramic target bombarded with ions releases atoms to form a thin coating on a sheet of glass. The resulting LOW-E product is often called "soft coat" or "sputtered".


See "Hard Coat" or "CVD"

Soft Coat

Also know as "sputtered", soft coat refers to LOW-E glass manufactured via the MSVD process. Less durable than its hard coat counterpart, soft coat LOW-E requires special storage and handling to prevent damage to the coating.

Solar Heat Gain Coefficient (SHGC)

The Solar Heat Gain Coefficient (or SHGC) refers to a window's ability to transmit solar radiation. The SHGC ranges from 0-1. A value of 0 indicates that the window functions like a wall, essentially preventing any solar energy from entering the building. A value of 1 indicates that the window functions like an opening, allowing all solar energy in. In cold climates, a high SHGC can lower heating costs by using passive solar heating. In warm climates, a low SHGC is desired to keep unwanted heat out and reduce cooling costs.

Solar Selective
Low E

Specifically designed to enhance comfort in warm climates, solar selective LOW-E is a LOW-E glass with a low solar heat gain coefficient, like Arkema's Sun ETM.


See "Soft Coat" or "MSVD"

Also known as the K-value, the U-value is a measure of a window's ability to transfer heat (usually given in W/m2K or Btu/hr ft2 oF). Windows with a low U-value, like Low Emissivity windows, are efficient insulators against heat loss.


Low Emissivity Glass’s primary application is wherever there is a need for enhanced thermal insulation and it achieves optimum performance from double glazing. It is widely used in facade glazing, windows double glazing, commercial buildings, gymnasiums and schools etc


Available on request



      Clear Float Glass  
      Low Iron Glass  
      Tinted Glass  
      Reflective Glass  
      Patterned Glass  
      Laminated Glass  
      Acid Etched Glass  
      Processed Glass  
      Low Emissivity Glass (LOW-E)