Can semen stains glow under black light ?

Factual Questions
1

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!

2

Need answer fast!

3

This thread on a different board starts from the given that semen will fluoresce under black light, and I don’t see anyone contradicting that.

4

Luminolreacts to iron found in blood. Not sure it would work with semen…

5

Luminol is for making blood glow, not semen. Semen will glow on it’s own under a black light. Blood does not glow under black light. However, when luminol reacts with the iron in the blood, it glows.

6

Are we talking about a proper forensic black light, or a black light bulb like you can buy at the supermarket? I have tested with the latter and it didn’t work.

7

Hi awldune,

is a black light i bought on amazon…I guess that’s the supermarket standard.

What’s your outcomes?
I have put that stain (on the bed sheet) right on the black light and it appears as yellow. It looks transparent under normal lights…

8

I’m curious where all of you experimenters are getting your sample mater… ohhh. Right.

9

This badly-recorded clip from The Office is the first thing I thought of when I read the thread title.

Perhaps the OP is Dwight Schrute? :wink:

10

Funny, I thought of Ming-Na from ER.

11

funny clip. :stuck_out_tongue: JohnT.

So now the question becomes: How do semen stains look like after scrubbing off? Would it be transparent? If it is still visible, does it mean it can be tested out?

12

I thought of this one.

13

5 months without washing the sheets. Now THAT’S class!

14

Without washing the *spunky *sheets, no less.

15

Am I the only one who read this as TASTED out?

16

My freshman year roommate went longer than that.

Needless to say, he wasn’t my soph year roommate.

17

Me too. Mine was one of those invisible ink pens, and I suspect the light was more blue than UV. Maybe not much high energy UV.

18

I put the uv light very close to the bed sheet, and saw some yellow colour on it. I guess if the room is dark enough and u put the light very close, it works.

19

(bolding mine)
Something tells me that semen was ‘summoned’ in a solo mission. :frowning:

20

You spelled rubbing off wrong.