UV light and paper.

[SourChipmunk]

maybe, but its a proven fact that UV light causes cancer, theres no way I would entertain having on constantly on in a room I am in.

UVB and UVC do, which are filtered. UVA is the only bit that's exposed, along with some reactive phosphor so you can see it.

edit: Just had a look-see at some new research, and it looks like its being debated about UVA being linked to cancer. So I'll just retract that comment.

 

[csmager]

Not elemental phosphorous, that's a nasty reactive metal. Phosphors is the word you're looking for.

EDIT and it doesn't reflect of it, it absorbs the UV and them re-emits the light in a bluer way. </science bit>

And this is why washing powder adverts are pretty much justified in saying their whites are 'whiter than white'...

 

[Messiah Khan]

Why not just use some UV reactive paint on your art work?

This is the piece ive designed(not finished yet). Its going to be printed across 24 sheets of A4 paper, so as you see.. it would require loads of UV paint, and wouldn't be very practicle or produce very good results IMO, i'd much prefer the white paper to glow on its own.

 

[benjo]

UV reactive paper

 

[Psyk]

EDIT and it doesn't reflect of it, it absorbs the UV and them re-emits the light in a bluer way. </science bit>

Wouldn't it technically reflect the light in a redder way? As in shifted towards the red end of the spectrum.

 

[Zip]

Wouldn't it technically reflect the light in a redder way? As in shifted towards the red end of the spectrum.

I think you might be thinking of the infrared end of the spectrum

 

[PardonTheWait]

maybe, but its a proven fact that UV light causes cancer, theres no way I would entertain having on constantly on in a room I am in.

The SUN gives you cancer, dude

Everything gives you cancer

 

[SpicyDuck]

If you live long enough, something is gonna come along and give you cancer.

Cotton on your clothes, leather on your shoes and, failing that, I'm sure water, tea or biscuits could give you cancer.

Phil.

 

[andi]

I wonder if I am the only one who instantly thought of that episode of Friends?

No

 

[Zip]

No

What happend in that eppisode of friends

 

[Clarkey]

I have never seen this episode of friends, but even I can tell you what happened, use your imagination

 

[andi]

Ross uses a teeth whitening kit for a date, but goes a bit OTT, so spends all night trying not to let her see his teeth. At the end of the night, they go back to her place, and she turns the lights down and turns some UV lights on, he thinks she won't see his teeth because its dark but when he smiles they glow really bright

 

[Clarkey]

allright, thats not quite what I had in mind, maybe thats too filthy for friends lol.

 

[Zip]

allright, thats not quite what I had in mind, maybe thats too filthy for friends lol.

I brought up seamans stains twice in this thread already

I thought it might have had something to do with the teeth i never saw the full eppisode though

 

[Clarkey]

seamans stains? Theres me thinking it was only semen stains which might just show up

 

[Zip]

seamans stains? Theres me thinking it was only semen stains which might just show up

seaman leave stains to
Dirty buggers they are

 

[Psyk]

I think you might be thinking of the infrared end of the spectrum

Infra-red is just before the visible spectrum on the red side and UV is just past the visible spectrum on the blue/violet side. Hence the names infra-red and ultra-violet. So if the UV is re-emitted as a visible wave, then surely it has been shifted towards the red end of the spectrum? Just not far enough for it to actually appear red.

 

[Messiah Khan]

It goes Infrared>Red>Orange>Yellow>Green>Blue>Indigo>Violet>Ultraviolet (with all the other visible shades inbetween). So surely the ultraviloets wavelength is being increased and shifted towards the Indigo/Violet and of the spectrum. Yes you are right that its moving towards the red end of the spectrum, but it has a long way to go.