Link: The coming solar eclipse!

Elefantman

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Sep 18, 2007
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My wife ran across an organization accepting donations of glasses to redistribute to SE Asia and South American, where they have eclipses over the next few years. My glasses have a warning on them not to use them after 3 years. IDK why...
They do that so you will buy more for the next eclipse. :)
 

Chukker Veteran

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They don't have a date and they came in a sealed plastic sleeve. I've emailed the company with an inquiry...
The sealed plastic sleeve suggests to me they really do have an expiration date, and it's not just a ploy to sell more. The sleeves bumps the cost for the manufacturer, I don't think they would raise the price to advance a scam.

It's a legitimate warning would be my guess.

But the next question, were they good for three years after purchase, or after the seal was broken.
 

Elefantman

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The sealed plastic sleeve suggests to me they really do have an expiration date, and it's not just a ploy to sell more. The sleeves bumps the cost for the manufacturer, I don't think they would raise the price to advance a scam.

It's a legitimate warning would be my guess.

But the next question, were they good for three years after purchase, or after the seal was broken.
It's possible the lens material starts to break down after being exposed to air.
 

day-day

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I wish I had thought to ask when I picked up my glasses last weekend. My lenses (film) on mine looked a little wavy after leaving a pair in the hot car so maybe they do break down. I was planning on using mine again when the next solar eclipse comes near our area.

I did ask about fireworks glasses. American Paper Optics makes these as well including ones that convert each exploding light into an image. I had looked through this type in the past in which each starburst turned into a shower of Mickey heads.
 

TIDE-HSV

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I wish I had thought to ask when I picked up my glasses last weekend. My lenses (film) on mine looked a little wavy after leaving a pair in the hot car so maybe they do break down. I was planning on using mine again when the next solar eclipse comes near our area.

I did ask about fireworks glasses. American Paper Optics makes these as well including ones that convert each exploding light into an image. I had looked through this type in the past in which each starburst turned into a shower of Mickey heads.
Mylar tolerates up to 440F and I doubt your car got that hot...
 

Chukker Veteran

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If I'm going to save my pair for the next eclipse, and I wonder if it would extend the shelf-life if I keep it in a sealed bag.

Edit: I should have read the link first. :)
 
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