Method for preparing reflecting coatings on glass

A method of producing mirrors, which involves depositing on a hot glass box, during the production process, a coating comprising a reflective layer and at least two layers that increase reflection, whereby the mirror has a reflection of light visible when less than 70 percent. A mirror with this coating is also supplied. In a preferred embodiment, the coating comprises: an inner layer, which has a refractive index of at least 1.6; an intermediate layer of relatively low refractive index: and an outer layer that has a refractive index of at least 1.6; the intermediate layer has a refractive index less than the refractive index of either the inner layer or the outer layer and less than 3, provided that at least one of the inner and outer layers is silicon, the added refractive index of the inner and outer layers is at least 5.5, and the thicknesses of the layers are such that the mirror has a reflection of visible light of at least 70 percent. In an alternative embodiment, one of the layers, inner and outer, may be composed of a low refractive index reflective metal.