Method for Producing an Article Made of a Transparent Material Devoid of Visible Surface Lines and The Thus Obtained Article

A method for obtaining a transparent article devoid of visible surfacing lines, comprising:

• obtaining a substrate made of a transparent material with a refractive index ns, of which at least one main surface has been ground and polished to a value of Ra varying from 0.001 to 0.01 μM but which shows visible surface defects in the form of thin individual scratches;
• depositing directly on the main ground and polished face of the substrate a liquid polymerizable composition of masking coating presenting a contact angle with the main face of the substrate of at least 30°, and forming by polymerization a masking coating with a refractive index nc such that 0.01<|ns−nc|≦0.15, and a thickness of less than 10 micrometers;
• the polymerization of the composition of masking coating;
• and
• the recovery of the transparent article of which the main ground and polished face of the substrate is directly covered by the masking coating, and which is devoid of visible fine surfacing scratches.