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so why don't common mirrors just use aluminum? It's already cheaper than silver, right?
by njdvndsjkvn 4y ago
so why don't common mirrors just use aluminum? It's already cheaper than silver, right?
- adrian_b 4y agoThe common mirrors have been using aluminum for a long time. I do not know when aluminum has replaced silver, but it was probably not a long time after WW2. The silver mirrors had the advantage that the metal could be easily deposited from a water solution, anyone could make silver mirrors at home, if desired. The aluminum mirrors use a vacuum deposition process, which requires very expensive equipment, but the cost per mirror is much less.
- njdvndsjkvn 4y agoAh. I misunderstood your earlier comment. Thanks!