# coors light **URL:** \ **Category:** Factual Questions\ **Created:** [June 17, 2013, 2:50am UTC](https://boards.straightdope.com/t/coors-light/661160 "2013-06-17T02:50:32Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![matt357](https://avatars.discourse-cdn.com/v4/letter/m/ecd19e/32.png) [@matt357](https://boards.straightdope.com/u/matt357)\ **Post date:** [June 17, 2013, 2:50am UTC](https://boards.straightdope.com/t/coors-light/661160/1 "2013-06-17T02:50:32Z")
when coors light bottles get cold the mountains on the label turn blue, how does that work? ---
**Author:** ![running\_coach](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/running_coach/32/15836_2.png) [@running\_coach](https://boards.straightdope.com/u/running_coach)\ **Post date:** [June 17, 2013, 3:00am UTC](https://boards.straightdope.com/t/coors-light/661160/2 "2013-06-17T03:00:57Z")
[Temperature sensitive ink.](http://en.wikipedia.org/wiki/Thermochromism#Inks) There’s also a version used for security marks on documents. ---
**Author:** ![beowulff](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/beowulff/32/542_2.png) [@beowulff](https://boards.straightdope.com/u/beowulff)\ **Post date:** [June 17, 2013, 3:01am UTC](https://boards.straightdope.com/t/coors-light/661160/3 "2013-06-17T03:01:11Z")
[This.](http://www.ctiinks.com) ---
**Author:** ![Ponch8](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/ponch8/32/9883_2.png) [@Ponch8](https://boards.straightdope.com/u/Ponch8)\ **Post date:** [June 17, 2013, 1:47pm UTC](https://boards.straightdope.com/t/coors-light/661160/4 "2013-06-17T13:47:10Z")
Now that the question has been answered, time for a hijack. My monthly train pass has a colored stripe that changes color or disappears when it’s heated. Most people can change the color just by holding it between their thumb and index finger, but I usually can’t unless it’s hot outside. I can only change the color by breathing on it. ---
**Author:** ![bob\_2](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/bob_2/32/3341_2.png) [@bob\_2](https://boards.straightdope.com/u/bob_2)\ **Post date:** [June 17, 2013, 2:17pm UTC](https://boards.straightdope.com/t/coors-light/661160/5 "2013-06-17T14:17:31Z")
> [@Ponch8](#): > > Now that the question has been answered, time for a hijack. My monthly train pass has a colored stripe that changes color or disappears when it’s heated. Most people can change the color just by holding it between their thumb and index finger, but I usually can’t unless it’s hot outside. I can only change the color by breathing on it. Begs the question - Why does it have a heat sensitive stripe? ---
**Author:** ![Ponch8](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/ponch8/32/9883_2.png) [@Ponch8](https://boards.straightdope.com/u/Ponch8)\ **Post date:** [June 17, 2013, 2:41pm UTC](https://boards.straightdope.com/t/coors-light/661160/6 "2013-06-17T14:41:19Z")
> [@bob\_2](#): > > Begs the question - Why does it have a heat sensitive stripe? To prevent counterfeiting. ---
**Author:** ![matt357](https://avatars.discourse-cdn.com/v4/letter/m/ecd19e/32.png) [@matt357](https://boards.straightdope.com/u/matt357)\ **Post date:** [June 23, 2013, 10:57pm UTC](https://boards.straightdope.com/t/coors-light/661160/7 "2013-06-23T22:57:29Z")
> [@runner pat](#): > > [Temperature sensitive ink.](http://en.wikipedia.org/wiki/Thermochromism#Inks) There’s also a version used for security marks on documents. Is that stuff safe for skin contact? ---
**Author:** ![moriah](https://avatars.discourse-cdn.com/v4/letter/m/b2d939/32.png) [@moriah](https://boards.straightdope.com/u/moriah)\ **Post date:** [June 24, 2013, 2:18am UTC](https://boards.straightdope.com/t/coors-light/661160/8 "2013-06-24T02:18:27Z")
> [@bob\_2](#): > > Begs the question - Why does it have a heat sensitive stripe? It’s a mood detector beer. The colors and what they represent are: Blue - hopeful, slight buzz Green - friendly, a bit grab handy Yellow - happy, laughs too loudly Orange - wary, racist remarks likely Red - paranoid, challenges to a fight Purple - calm, passed out with a chance of inhaling own vomit ---
**Author:** ![DCnDC](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/dcndc/32/2842_2.png) [@DCnDC](https://boards.straightdope.com/u/DCnDC)\ **Post date:** [June 24, 2013, 2:23am UTC](https://boards.straightdope.com/t/coors-light/661160/9 "2013-06-24T02:23:41Z")
But how cold is it when the label turns blue? Apparently, [nobody really knows](http://www.fastcompany.com/3001212/how-cold-coors-lights-super-cold-beer), and if Coors knows, they’re not telling. ---
**Author:** ![Great\_Antibob](https://avatars.discourse-cdn.com/v4/letter/g/e47c2d/32.png) [@Great\_Antibob](https://boards.straightdope.com/u/Great_Antibob)\ **Post date:** [June 24, 2013, 2:25am UTC](https://boards.straightdope.com/t/coors-light/661160/10 "2013-06-24T02:25:38Z")
> [@matt357](#): > > Is that stuff safe for skin contact? Why not? Those thermal sensitive shirts seemed to be a big fad in the 90s for a while. I can see where it might not be a good idea to drink gallons of that stuff, but I’d suggest against drinking gallons of pretty much most things. …of course, that might explain this two decades’ old rash. 😉