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Hi All

At our museum, we are getting more and more exhibits require polarized 
eyeglasses for 3-D shows.  Then, we immediately come to a dilama whether 
use-once paper type or reusable plastic one is more economy.  

Now, we are using paper one (linear) costs around US$0.12 each.  However, 
the next exhibit will use circular one that costs around US$1.4 each.  This 
really drive us to think twice whether to clean the plactic one by washing 
machine will be cost effective.

Therefore, I would eagler to know your experience in using plactic polarized 
eyeglasses and whether you have them cleaned in-house or by outside service 
provider?

Thanks

CK WONG
Senior Technical Officer
Hong Kong Science Museum

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