How to Create a Realistic 'Bleeding-Knife' Effect

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Introduction: How to Create a Realistic 'Bleeding-Knife' Effect

About: I create and teach makeup effects and prosthetics for a living. I love The B52's, good sarcasm and boring things like history, science and Radio 4.

Hi

Stuart here from http://www.learnprostheticmakeup.com/


This video shows you how I created a realistic 'bleeding blade' to simulate skin cutting for a TV show I did a few weeks back.

There was no time or budget to make a fake chest, and I was not sure where the camera would be so I had to make it work from every angle, make it safe and make it quick. I recreate the process for you here. 

Please leave comments or get in touch if you have any questions!

Thanks
Stuart

mail@learnprostheticmakeup.com

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Check out my new blog where I will be posting other tutorials, articles and makeup FX goodies: http://www.learnmakeupeffects.com/blog/
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    32 Discussions

    0
    srhadaham
    srhadaham

    9 years ago on Introduction

    the effect looks awesome, and made me cringe every time.

    0
    frarugi87
    frarugi87

    2 years ago

    Just came here today and... This is horrible............ Really horrible :P

    0
    ElvisE2
    ElvisE2

    4 years ago

    Is this cheap to make how much was it?

    0
    jsvitlik
    jsvitlik

    8 years ago on Introduction

    Nice!! instead of making a syringe, I made a little chamber inside the knife, and added a little push button in the hole. so if i wanted to make it bleed, i pushed the button which squeezed the plastic chamber and out comes the blood! Just a simple modification so you can do it in front of your friends without bringing around a syring and tubing everywere xD

    0
    gl0rious
    gl0rious

    8 years ago on Introduction

    step 1:
    cut self/sibling/friend/other with knife
    step 2: done

    0
    08motooley
    08motooley

    9 years ago on Introduction

    looks like it could be quite good on stage we were going to have a really dramatic scene in drama class where someone committed suicide with a knife but i was having trouble with it thanks for this

    0
    SP Tutorials
    SP Tutorials

    9 years ago on Introduction

    Hey im totally going to make this but where did you get the syringe. i have actually been looking for one of those for awhile. i wanted to make bledding effects like getting knifed in the face or something. please responde asap. thanks

    0
    stuartbray
    stuartbray

    Reply 9 years ago on Introduction

    Hey

    Try searching 'Laboratory Supplies', '100ml syringes', 'Vet Supplies' and 'Large Hypodermic Syringes'.

    Most syringes for general medical use are much smaller volume syringes, so to hold this amount of liquid, you may need a vet suppliers or laboratory equipment supplier.

    You'd be surprised how commonly these things are used, for all kinds of industry. Think any kind of work where accurate measurement of fluids such as ink cartridge refilling, etc.

    Regards
    -Stuart

    0
    SP Tutorials
    SP Tutorials

    Reply 9 years ago on Introduction

    thanks dude u r freaking amazing. keep up the great prop making.

    0
    Hephestus
    Hephestus

    9 years ago on Introduction

    if you use liquid latex and put a thin covering over the part you wish to cut, when you move the blade away it would leave a mark where you ripped the latex looking more realistic to the viewer.

    0
    stuartbray
    stuartbray

    Reply 9 years ago on Introduction

    Hi Bubble

    He he...it really does, doesn't it?

    Well, the blood I used was a sugar syrup blood (as many of them are) and was quite orangey-yellow.  I though it may also have been a little thick to pump easily down the blade.  I was worried it may not flow quick enough as the gag need to be quick to be most effective rather than a lingering closeup which may reveal the trick, so I added a little water.

    The thinned blood ran easily, but where it was thinner at the top of the flow, it revealed my pasty-white skin and the blood colour as a result (thicker pools of blood appear darker).  Real blood is not actually that translucent, rather it is opaque so would not reveal the pale skin underneath so readily.

    Also, I was shooting under fluorescent lights and these have a blue tinge which combined with the orangey-yellow blood makes for a brown colour. 

    I am going to get a better camera with improved white balance (and HD) to help this issue.  Good point, though!

    Regards
    Stuart

    0
    bounty1012
    bounty1012

    9 years ago on Introduction

    Wow, this really brought up the notch for those other fake blood syringe pump effects. Its looks very realistic. I might have to build one for next halloween.

    0
    J-Manoo7
    J-Manoo7

    9 years ago on Introduction

    NICE. 5*
    Blood reminds me of BBQ sauce. Yummy.

    0
    J-Manoo7
    J-Manoo7

    Reply 9 years ago on Introduction

    hmmm... it appears I have a BBQ stain on my shirt.. hahaha