ExciRAY®
GEW’s ExciRay lamp systems utilise dielectric barrier discharge (DBD) lamps to produce quasi-monochromatic vacuum ultraviolet radiation, typically at 172nm. This radiation is commonly used for mattification of surface coatings, modification of surface tension for improved adhesion or surface cleaning for semiconductor and medical industries.
GEW ExciRay lamps, which are incorporated into the familiar NUVA2 cassette design, can be produced up to 255cm in length and can be custom integrated for your specific application, including provision for all required nitrogen inerting and control.
They are also seamlessly integrated into the wider GEW UV system which may be required for gelling or final cure so that GEW can provide a turnkey mattification solution for your process. Our experienced engineers also ensure rigorous adherence to international safety standards.

ExciRay Mattification Process
Mattification of coatings for various applications, including decorative laminates for:
- Flooring and furniture, PVC flooring, wood panels, plastic parts, etc.:
- Gelling: Partially cures the coating, increasing its viscosity to resist subsequent ExciRay microfolding. Changing gelling power can modify coating texture, 85° gloss level and soft touch properties. Typically not inerted.
- Mattification: 172nm radiation from the ExciRay lamp fully cures the top layer of coating and shrinkage causes microfolding, which results in a matt surface. This process must be inerted.
- Final cure: A powerful mercury or LED lamp cures the coating all the way through. This can optionally be inerted depending on application requirements.

Benefits of ExciRay
- Deep matt down to 1.2 gloss units @60 deg
- Soft touch finishes
- No matting agents for increased coating durability and process simplification
- On/off instantaneous matting
- Fully integrated into pre-gelling and final cure UV system
- Familiar cassette design for easy lamp change and maintenance
- Integrated into GEW’s standard Rhino power and control platform
ExciRay Specification
Max electrical power
5W / cm
Peak wavelength
172nm*
*222nm & 308nm available on request
Irradiance at focal point
65mW / cm²
Maximum length
255cm
Standard cross section
145mm (W) x 425mm (H)
Cooling
N₂
Standard max operating temperature
40°C (104°F)
Standard max humidity
Non-condensing
