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The Color of the Future: A history of blue

(www.hopefulmons.com)
130 points prismatic | 1 comments | 04 Sep 25 09:27 UTC | HN request time: 0.199s | source
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TomMasz ◴[04 Sep 25 11:25 UTC] No.45126031[source]▶
I'm old enough to remember a time before blue LEDs. Funny how they're everywhere now.

I make photo prints using the cyanotype process and a UV LED light source. It's a combination of old and new technologies with a very unique look. While the sensitizing solution contains cyanide, it's fine as long as you wear gloves (and don't drink it).

replies(2): >>45126459 #>>45129001 #
1. IAmBroom ◴[04 Sep 25 12:24 UTC] No.45126459[source]▶
I just received a blue laser as a throwaway free gift in a package of goods totalling about $50. It wasn't even advertised as a freebie in the website, not even at checkout.

It stuns me, because I am an old enough optical engineer to remember the excitement around the first blue laser. Also, who wants one? Not nearly as bright nor energy efficient as a red one (and the battery died with under a minute of use).