What should be done to mirror edges to protect the silvered surface from moisture?

To protect the silvered surface of mirrors from moisture, the best practice is to ground and paint the edges. When the edges of a mirror are ground, it creates a smooth finish that helps to reduce the risk of chipping or damage. This is crucial because any chips or rough areas can expose the silvered surface to moisture, leading to damage like discoloration or deterioration.

After grinding, painting the edges creates a barrier that effectively seals the silvered surface from moisture intrusion. This combination of grounding and painting not only enhances the mirror’s durability but also contributes to its aesthetic appeal by providing a clean, finished look.

Polishing the edges alone does not seal the surface adequately against moisture, while painting alone without grinding may not address potential sharp edges. Similarly, beveling may enhance the look of a mirror but does not provide adequate protection against moisture. Hence, grounding followed by painting is the most effective method to ensure the longevity and appearance of a mirror by protecting it from environmental factors.