Register to reply

Semen stains glows under black lights (uv light)?

by toomuchagony
Tags: black light, glow, luminol, semen stains
Share this thread:
toomuchagony
#1
May23-12, 04:01 PM
P: 2
Hi all,

Can anyone tell me if semen stains would definitely glow under a black light (UV light) ?

I've been told that they would glow in greenish-yellow under the UV light.
But later on someone said semen stains cannot glow without a substance called 'luminol'.
Which one is true???


And if the semen stains were stuck on a bed sheet like 5 months ago,(being slept on but never been washed), is it possible that the semen substances still remain on it? Would the scrubbing or fiction makes them totally coming off or disappear?

Thanks in advance!
Phys.Org News Partner Biology news on Phys.org
Sheepdogs use just two simple rules to round up large herds of sheep
Monarch butterflies plummet 90 percent, need protection
And then there were 10?unexpected diversity in New Zealand kanuka genus Kunzea
phylotree
#2
May24-12, 02:41 AM
P: 50
And if the semen stains were stuck on a bed sheet like 5 months ago,(being slept on but never been washed), is it possible that the semen substances still remain on it? Would the scrubbing or fiction makes them totally coming off or disappear?
Almost all "natural" fluids'colors (e.g yellowish color juices from mango, jack-fruits, Indian and Vietnamese curry etc) are hard to get rid off by only detergents sold in the market. Men's semen is the same. It sucks up and stains the materials'fibers, and then discolors the area. Once it is discolored, how can you get it back ? Therefore, it is advisable for you to wash the stained areas right after they are being "soaked".
Monique
#3
May24-12, 03:20 AM
Emeritus
Sci Advisor
PF Gold
Monique's Avatar
P: 4,642
Bed sheets being unwashed for 5 months, but being slept on? Yuck. Sheets should be washed regularly, like once a week.

tkjtkj
#4
May24-12, 07:55 AM
P: 41
Semen stains glows under black lights (uv light)?

Quote Quote by toomuchagony View Post
Hi all,

Can anyone tell me if semen stains would definitely glow under a black light (UV light) ?

I've been told that they would glow in greenish-yellow under the UV light.
But later on someone said semen stains cannot glow without a substance called 'luminol'.
Which one is true???


And if the semen stains were stuck on a bed sheet like 5 months ago,(being slept on but never been washed), is it possible that the semen substances still remain on it? Would the scrubbing or fiction makes them totally coming off or disappear?

Thanks in advance!
Yes, semen glows under UV light; No: luminol is used to discover blood stains; and Yes: wash your sheets much more often!
Andy Resnick
#5
May25-12, 08:02 AM
Sci Advisor
P: 5,523
Quote Quote by toomuchagony View Post
Hi all,

Can anyone tell me if semen stains would definitely glow under a black light (UV light) ?

<snip>
Usually it does, but the signal can be masked by other compounds (and the fluorescent proteins degrade over time):

http://ncforensics.wordpress.com/201...u-should-know/

Note also the difference between "presumptive" and 'confirmatory'.
toomuchagony
#6
May25-12, 02:12 PM
P: 2
Would semen stains appear as transparent (like an oil stain) under friction after a long period of time, say 5 months?


Register to reply

Related Discussions
Light Glows around Spouse in Dark Room General Discussion 44
LED light bulbs from Lights Of America General Discussion 31
How come there is visible light in Uv lights? General Physics 3
Black lights General Physics 1
Statue of Mary glows, and faithful see the light General Discussion 3