1. Working Principle of Lens Coating Solution
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The film formed by coating solution changes the microscopic structure of the lens surface, making it extremely smooth like a smooth protective coat. Oil can easily penetrate and spread on rough ordinary lenses, yet it can only slide on coated smooth lenses and hardly stay to form obvious oil stains.
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The coating enhances lens hydrophobicity by changing surface tension. Water beads up and rolls down coated lenses. Similar in properties to water, oil can be partially washed away by rolling water droplets, further reducing oil residue and achieving anti-oil stain effects.
2. Factors Affecting Anti-oil Effect
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Service life: The coating gradually wears off and erodes over time. Friction with clothes, tables and other daily items weakens the smoothness of the coating, increasing oil adhesion and lowering anti-oil performance. Newly coated lenses work best, while the effect may drop after several months of use.
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Grease concentration in the environment: In heavily greasy places such as kitchens, excessive grease exceeds the anti-oil limit of lens coating and leaves noticeable oil marks. Different ingredients of grease also exert different influences; some sticky grease adheres more easily and weakens the anti-oil effect.
