Easiest Diy Black Light Out of Any Flashlight!

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Introduction: Easiest Diy Black Light Out of Any Flashlight!

Doesn't that intro image look cool?

Believe it or not, it was drawn using plain yellow highlighter!

You can do exactly the same thing with any torch, all you have to do is follow the steps!

The first photo is using the black light ad the second photo is the "control" normal light.

Read on to find out how...

Step 1: Parts:

All you need is the following:

  1. Rubber bands
  2. One BLUE SHARPIE
  3. One PURPLE SHARPIE
  4. one torch (or flashlight for the Americans)
  5. Some Glad wrap/Cling wrap/Saran wrap/CLEAR STUFF!
  6. Some scissors to cut the Glad wrap/clin---- I think you read the above...
  7. Some slight skill
  8. A yellow highlighter
  9. Some paper to draw on
  10. And that's it!

Step 2: The First and Second Layers.

This was my biggest issue, I couldn't get a clear photo of the clear wrap.

What I have done is cut out a piece of paper to show you the size you need to cut the clear wrap.

I also included a photo of the rap to show you how hard it was to photograph it, to end it I put a high contrast so you can see what the wrap will look like exactly when you cut it.

Anyway, cut a piece of wrap, the size in relation to your torch and secure it using a rubber band.

Now take the blue SHARPIE and colour it in over the lens of the torch, you can turn it on and off periodically to check for gaps.

It is here I would like to note that if the torch is high-ish powered the lens might get too hot and melt through the clear wrap, if this happens, choose a dimmer torch.

Once you have your first layer coloured blue you can repeat this step, you need a total of two blue layers.

Step 3: The Last Layer!

Now it is time for the last layer to go on.

You need to cut the same sort of square of clear wrap as before and apply it to the torch in the same manner.

The only difference is that this time you will colour it in PURPLE.

After you finish it off you can turn it on and enjoy your very ow Black light!

Make it Glow!

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    18 Discussions

    0
    jmcdowell15
    jmcdowell15

    Reply 6 days ago

    Should do but I’m not sure if it can be used to detect all pet urine

    0
    JM1999
    JM1999

    Reply 5 years ago on Introduction

    I am unsure, next time I get a chance to try it I will definitely give it a go :)

    0
    jmcdowell15
    jmcdowell15

    6 days ago

    What could I use to draw/write that only shows up in a black light? Anyway excellent instructable :)

    0
    Jborean
    Jborean

    11 months ago

    This doesn't work... It just makes a blue light that might make neon things seem to glow. It will not react to other things like a real UV Light... Unfortunately.

    0
    ChrisR151
    ChrisR151

    4 years ago

    With these tips in mind, I'll be all set for July 26th. Thanks ^_^

    0
    macyr2
    macyr2

    Reply 3 years ago

    That is my birthday :)

    0
    BoondaPhD
    BoondaPhD

    Reply 2 years ago

    Me too!!

    0
    Crazy atH
    Crazy atH

    Reply 3 years ago

    You also came because of Journal 3?

    0
    reiniaV
    reiniaV

    Reply 3 years ago

    jup..

    0
    BoondaPhD
    BoondaPhD

    2 years ago

    Did you know that a fully ripened banana glows under black light? This is why I searched for this and also there was a slime that glows under black light.

    0
    KathleenS1
    KathleenS1

    2 years ago

    I found this after I looked for removing cat urine from a feather comforter. It called for a black light to locate the urine so here I am.

    0
    Kevin KarlD
    Kevin KarlD

    3 years ago

    Can I use different brand of marker?but ofcourse same color :-)

    0
    JM1999
    JM1999

    Reply 3 years ago

    You should be able to use a different brand marker, trial and error should show you the best way to get great results though :)

    0
    sm19sm19
    sm19sm19

    3 years ago

    Amazeballs it works.

    0
    JM1999
    JM1999

    Reply 3 years ago

    :)