Merck windows technolgie B.V. is the developer ofLiquid Crystal Windows an innovative switchable glazing. LCW puts you in control of the light in your buildingLCW Solar glazing switches from dark to clear at the flick of a switch. A range of colors and shading can be tuned to your requirements. Our new LCW Privacy glazing switches from opaque to really clear instantaneously. LCW glazing can be used for interior and exterior applications for facades or windows.