Standard Operating Procedure ensuring every vintage sunglass and optical frame meets European standard EN ISO 12312-1:2022 before customer dispatch.
Microscopic examination of factory hallmarks (e.g. B&L laser etchings on vintage Ray-Ban, serial numbers on Cartier Santos temples, Kering RFID security tags). Rejection of any counterfeit or compromised frame.
Submersion into temperature-controlled ultrasonic cleaning bath (35 kHz) with specialized non-ionic optical surfactant to eliminate micro-dirt from screw threads and nose pad brackets without harming vintage acetate or gold electroplate.
Placement under high-precision optical lensometer to verify lens integrity, absence of optical distortion, and digital spectrophotometer scanning ensuring 100% UV cutoff at 400nm.
Manual precision tightening of temple hinges using optical torque screwdrivers and installation of fresh medical-grade anti-slip silicone nose pads for maximum ergonomic comfort.
Placement in hard protective velvet case, insertion of microfiber lens cloth and printed UV400 Certificate of Compliance, sealed in cushioned air column mailer, and scanned for express courier dispatch.