Method for evaluating the sensitivity of a glazing to forming quench marks

A process for manufacturing a glazing, comprising:

• carrying out a method, for evaluating a sensitivity of the glazing to forming quench marks depending on its anisotropy, said sensitivity being evaluated by computing a parameter σv, said glazing comprising a first face and a second face, both making contact with an exterior environment, said quench marks resulting from different optical phase shifts in different regions of the glazing for a vision in transmission or in reflection and from either side of the glazing, said method comprising
• a computer-implemented step of computing at least one parameter of transmission through the first face or through the second face, or at least one parameter of reflection from the first face or from the second face, said computation being carried out for a region of the glazing inducing no optical phase shift and for a region of the glazing having birefringence axes oriented at a given angle with respect to a plane of incidence and inducing an optical phase shift δ in a light ray in a given optical phase-shift domain, for a given polarization of the light ray and for a given angle of incidence of the light ray;
• a computer-implemented step of computing at least one parameter ΔE(δ) corresponding to a color difference between the region of the glazing inducing no optical phase shift and the region of the glazing inducing the optical phase shift δ, on the basis of at least one of the parameters or transmission or reflection, then
• computing the parameter σv by applying a function G dependent on the one or more computed ΔE(δ) and where appropriate on the one or more corresponding optical phase shifts δ,
• wherein the glazing comprises a coating system comprising a thin layer or a stack of thin layers on one or both of the first and second faces,
• then producing the coating system.