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Re: Portable Lasers: 456nm vs. 463nm
The surface of the balloon is reflective and might send the beam back at your eyes depending on the hit angle. It's unlikely it'd still be collimated, but I'm not fully convinced it's safe. I suppose one could perform an experiment with glasses and look for a dot being reflected back for the balloon at an opposing wall.
I'll admit I've done this a couple times, but it's been a few years and now I don't do any burning whatsoever without goggles.
I have an honest question, though: Would it be bad to pop balloons from across the room with one of the lasers I mentioned above (without glasses)? Also, I'm not talking about popping balloons all day or anything, just for maybe a minute or two and at ten or so feet. (I'm not looking for a Dr.'s quotable answer or anything, just how maybe you'd feel about doing that.)
The surface of the balloon is reflective and might send the beam back at your eyes depending on the hit angle. It's unlikely it'd still be collimated, but I'm not fully convinced it's safe. I suppose one could perform an experiment with glasses and look for a dot being reflected back for the balloon at an opposing wall.
I'll admit I've done this a couple times, but it's been a few years and now I don't do any burning whatsoever without goggles.