Superbowl 3D glasses - congo blue?
What I was wondering was if that blue was Congo blue (LEE C181, like in Kipkay's IR goggles ible), so I could use them in making nightvision goggles.
Info that might help - patent number 6687003
As a Pro member, you will gain access to download any Instructable in the PDF format. You also have the ability to customize your PDF download.