polished sapphire
Minor Scratch Repair: Initial grinding with diamond abrasives to remove larger scratches and irregularities from the surface. Make the abrasive with a moderate grain; too coarse may cause new scratches.
For moderate to deep scratches, specialized grinding and polishing techniques are required. Initial sanding with 150# grit sandpaper (for example) removes surface irregularities and initially lightens scratches, followed in turn by further sanding with finer 100# grit sandpaper, and finally polishing with a wool buffing wheel to bring the surface back to a polished finish.
polished sapphire
Sapphire Glass Scratch Repair Precautions:
Sapphire glass has high hardness, and shallow scratches can be effectively repaired by fine grinding and polishing. If you have a polishing machine, you can use a polishing disk suitable for sapphire.
– Make sure the speed of the polishing disk is moderate to avoid overheating and damaging the sapphire.
For deep scratches, it is advisable to seek professional jewelry restoration services if the scratches are deep or large. In particular, scratches that have penetrated the surface plating may require the replacement of the entire mirror, as deep scratches may affect the optical performance and water resistance of the mirror.
When repairing on your own, be sure to operate carefully to avoid further damage to the mirror.
