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- Path: sparky!uunet!wupost!waikato.ac.nz!canterbury.ac.nz!equinox.gen.nz!equinox!Geoff
- Newsgroups: alt.folklore.science
- Subject: Re: Perceiving "Neon/Florescent" Colors
- Message-ID: <Geoff.61ik@equinox.gen.nz>
- From: Geoff@equinox.gen.nz (Geoff Mccaughan)
- Date: 22 Dec 92 21:26:38 +1200
- References: <1h5ehoINN707@cronkite.Central.Sun.COM>
- Organization: Equinox Networks
- X-Newsreader: TIN [version 1.1 PL8]
- Lines: 30
-
- Pete Stryjewski (pstryjew@colsun.Central.Sun.COM) wrote:
-
- >How does the human eye perceive "Neon/Florescent" color (i.e. hot pink,
- blaze
- >orange, the Crayola Florescent Crayons)?
-
- >I assume it has something to do with absorption of UV light, but where in
- the
- >spectrum do they reside? Are they hiding in the "visible" spectrum? How
- are
- >the dyes made, I can't make them with additive mixing of the three
- primaries.
-
- >I haven't been able to get an answer to this question for years (well, I
- just
- >asked a couple people, that is the extent of my research).
-
- >Answers/Ideas?
-
- My understanding is that these colours actively floresce in the presence of
- the UV in natural light, you can't expect to reproduce their properties with
- any mix of conventional dyes.
-
- I believe similar stuff is put in washing powder to make your wash "whiter"
- and "brighter" [than what one wonders...].
-
- --
- Geoff, Sysop Equinox (equinox.gen.nz) +64 (3) 3854406 [4 Lines]
- Voice: +64 (3) 3852101
- "Hi. You have just entered the fourth dimension. Small isn't it?"
-