06-09-2008, 09:09 AM | #1 |
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Color: Silver or Dark Blue
When I opened a thread just after buying my PRS 505, we discussed about the offered colors. Obviously it largely depends on one's taste and sometimes on its availability. Someone mentioned the contrast created by the color against the text background as well. However, I think there's another practical side. Let me explain!
Last week I was on holidays and I did a lot of reading on the beach and most of the time under the sun. And yesterday, when I was watching the Discovery Channel, they were experimenting with two different surfaces, one black and one white. They put them both under the sun with an initial temperature of 27C (80F) and pretty soon the difference was impressive with the black surface gone to 48C (118F). So, I think, the dark blue will get hotter under the sun... |
06-09-2008, 12:08 PM | #2 |
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I apply a liberal amount of sunscreen to my blue 505 when spending a day in the sun
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06-09-2008, 12:19 PM | #3 |
zeldinha zippy zeldissima
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06-09-2008, 12:25 PM | #4 |
Hi There!
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What works for me is a simple baseball cap. I just put the device (inside its Ziploc bag) into the hat and let the brim shade it. Works like a charm, and the print doesn't disappear in the sunshine either when it is shaded.
Where there's a will - and a beach - there is a way! Last edited by DixieGal; 06-09-2008 at 12:26 PM. Reason: Rats! I forgot to mention that to Alex T before he went on vacation. |
06-09-2008, 12:37 PM | #5 | |
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Given that the Reader has a somewhat shiny metallic surface, it shouldn't have too much of a problem in sunlight. |
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06-09-2008, 01:44 PM | #6 |
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06-09-2008, 01:45 PM | #7 |
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06-10-2008, 04:54 AM | #8 |
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That's because silver is reflective. It has little to do with the "colour" of it, as such. A car with matt white paintwork will get just as hot as one with matt black paintwork. The reflectivity of the surface is a far more important factor in how much heat it absorbs than the colour.
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06-10-2008, 04:56 AM | #9 |
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Matt surfaces are more efficient radiators and emitters of heat. A shiny silver radiator wouldn't work very well at all as a radiator of heat, and similarly a shiny silver surface is a very poor absorber of heat. This is elementary physics.
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06-10-2008, 07:14 AM | #10 |
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Hum! I would have thought that being "shiny" is elementary "optics" as it's the ability to reflect the light and that conducting heat would be elementary "chemistry"... (such as water conducts heat 20 times better than air)... Such or such paint may conduct the heat better but it doesn't make any sense to say "a color" is a better heat conductor...
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06-10-2008, 07:29 AM | #11 | |
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06-10-2008, 08:17 AM | #12 |
Legal Alien
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That's the only reason why I preferred the silver one. In the end, I got the blue one anyway
But color sure makes a difference. Reflection can help, but only so much. The blue one will always get hotter. The silver one might increase sun glare in the same circumstances. |
06-10-2008, 10:00 AM | #13 |
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My original was blue. I recently exchanged it because the battery was weak, and all they had was silver in the store. I want the blue one back. The silver does trick my brain into seeing a much darker background on the display.
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06-10-2008, 10:32 AM | #14 |
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I bought a silver and my wife a blue. In the hot Florida sun after a few hours of poolside reading they both get _very_ toasty.
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06-10-2008, 10:46 AM | #15 | |
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