Semen stains glows under black lights (uv light)?

  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. jcsd
  3. 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".
  4. Monique

    Monique 4,445
    Staff Emeritus
    Science Advisor
    Gold Member

    Bed sheets being unwashed for 5 months, but being slept on? Yuck. Sheets should be washed regularly, like once a week.
  5. Yes, semen glows under UV light; No: luminol is used to discover blood stains; and Yes: wash your sheets much more often!
  6. Andy Resnick

    Andy Resnick 6,143
    Science Advisor
    Education Advisor

  7. Would semen stains appear as transparent (like an oil stain) under friction after a long period of time, say 5 months?
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