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As we know, at higher altitudes the dose of UV rays increases, and planes usually spend a larger time there, then why aren't windows of airplanes made UV proof. A simple coating on the inside might solve the problem.

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Firee
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    are you asking if they are, or do you already know the answer and are asking why is it so? – Federico Jan 20 '16 at 13:26
  • I would like to know are they UV proof.. Older aircrafts may not be, but maybe some new aircraft might have some coating.. And if they are not, then why don't they address the issue. – Firee Jan 20 '16 at 13:28
  • @Firee The top answer to the other question explains it quite clearly: Yes, they are enough UV-proof. I fail to see what you want to achieve. – yo' Jan 20 '16 at 13:32
  • @yo: Read the edit on the answer you are referring to. It says it needs some kind of coating. So, do aircraft manufacturers apply any kind of coating? – Firee Jan 20 '16 at 13:35
  • Ah ok. Still I don't think it makes sense to ask this question; it would be more sensible to update the answer to the other question. – yo' Jan 20 '16 at 13:37
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    Then please consider revising the wording, in your title you ask if, but when you say then why aren't you are assuming they aren't. – Federico Jan 20 '16 at 15:34
  • Are you asking about cockpit windows or cabin windows? – RedGrittyBrick Jan 20 '16 at 15:53
  • Can't find a specific reference right now but afaik aircraft that fly at higher altitudes have windshields made of laminate safety glass. The same kind as in a car windshield just much thicker. Laminate glass blocks nearly all uv. I don't know about the cockpit side windows, tho. The side windows in a car are usually tempered glass which does not block uv unless it's coated or tinted. Tempered glass is stronger and harder to break but shatters into dangerous shards and upon breaking offers no resistance to penetration. That's why car windshields are required to be laminate – TomMcW Jan 20 '16 at 18:57
  • @Firee, the accepted answer of the question you yourself link clearly explains that the two most common materials for aircraft windows provide UV protection as inherent property of the materials. The last sentence of not being UV-hard refers to the material itself needing specific treatment if it is to be used in application where it will be exposed to sunlight. – Jan Hudec Jan 20 '16 at 19:20

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