Optical frames, particularly acetate frames, are made through a multi-step process involving specialized materials and techniques, taking approximately 45 days to complete. Here's a breakdown:
Acetate Frame Production:
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Material Preparation: Acetate, the primary material, originates from cellulose powder. This is then mixed with pigments (for color), solvents, and plasticizers (for flexibility and durability).
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Sheet Formation: The mixture is processed to create sheets of acetate in various colors and patterns.
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Frame Cutting: Frame shapes are cut out from these acetate sheets using computer-controlled (CNC) milling machines or other precision cutting tools. This ensures accurate dimensions and consistent design.
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Shaping and Forming: The cut-out frame fronts and temples (arms) undergo shaping processes to achieve the desired curvature and contours. This may involve heating and molding.
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Hinge Attachment: Hinges, typically made of metal, are securely attached to both the frame front and the temples. This allows the temples to fold.
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Tumbling: The frames are placed in tumblers with abrasive materials to round the edges and smooth the surfaces. This step is crucial for comfort and aesthetics.
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Polishing: Skilled operators hand-polish the frames to achieve a high-gloss finish, removing any remaining imperfections. This is a critical step in enhancing the frame's visual appeal.
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Assembly and Quality Control: The frame front and temples are assembled, and the finished frames undergo thorough quality control checks to ensure they meet specifications and are free of defects.
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Finishing Touches: This may include adding nose pads or other comfort features.
In summary, the creation of optical frames is a blend of automated processes and skilled craftsmanship, resulting in a durable and aesthetically pleasing product.
