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Does anyone know of any database/list of the reflectivities of various common materials one would be likely to encounter while shining their lasers around? You know, concrete, wood, plastic, clear glass etc. This kind of information could be very useful in deciding what stuff to stay away from...

As I understand, sunglasses can have an absorptance anywhere between 3:1 and 10:1, so I'm thinking if this is evenly distributed across the spectrum you should be able to get adequate protection with sunglasses while using lasers with powers between 3 x 5mW and 10 x 5mW (depending on the quality...