Patent ID: 8445112

Claim:
An essentially transparent glazing comprising a system of films deposited under vacuum by magnetron and having antisun properties, low-emission properties, or both properties, the system of films comprising: a silver-comprising infrared-reflecting layer; a metal oxide barrier layer contacting and covering the infrared-reflecting layer, a dielectric layer on which the infrared-reflecting layer is deposited, or both; and a top coat comprising a mixed oxide, the mixed oxide comprising titanium oxide and at least one other metal oxide of high hardness selected from the group consisting of: ZrO 2 , SiO 2 , and Cr 2 O 3 , wherein colorimetric characteristics of light transmission (Tv), of layer-side reflection (Re), and of glass-side reflection (Ri), are such that, in the CIELAB coordinates for 10° , variations observed in the glazing, before and after heat treatment at 550° C. for 5 minutes, satisfy a relationship: Δ E =[(Δ L *) 2 +(Δ a *) 2 +(Δ b *) 2 ] 1/2 ≦4, for each transmission and reflection.