How to Make a Fake Mouth

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Make a fake mouthpiece.
Make a fake mouthpiece. (Image: Hemera Technologies/PhotoObjects.net/Getty Images)

A prosthetic is an artificial body part designed to take the place of a previously existing body part. In theater and movie making, prosthetic devices are often used to help alter the identity of the actor wearing it. Prosthetic devices also may be used around Halloween time as part of a costume. One way to create a realistic effect is to apply a fake mouthpiece. When done properly, the mouth will move up and down as you speak and blend flawlessly into your skin.

Things You'll Need

  • Liquid latex
  • Pottery clay
  • Lamp
  • Food coloring
  • Makeup
  • Pencil or small stick
  • Paint brush
  • Bowl
  • Scissors
  • Spirit gum

Sculpt your clay into the shape you want your fake mouth to be. For smaller sculpting, such as the teeth, you may want to use a pencil or small stick to create fine lines in the clay. Exaggerate the features so they are slightly larger than normal. This will help later when you apply the liquid latex.

Brush a thin layer of liquid latex onto your mouth mold. Be sure to cover the entire mold. Wait for the liquid latex to dry. This can take anywhere from a few minutes to a few hours, but can be sped up by placing the mold under a lamp. Once the mold is dry, repeat this step, adding an additional five layers of liquid latex.

Pour a small amount of liquid latex into a bowl and add a few drops of food coloring. The coloring you need depends on the mouth you're sculpting. For example, if you are trying to create bloody fangs, add a few drops of red food coloring for the teeth. If you want the rest of the mouth to be tan, pour more liquid latex in another bowl, then add a drop of yellow and brown. Stir the coloring into the liquid latex until it reaches the desired shade.

Brush the colored latex onto the desired parts of the mouth mold. Repeat this step at least five times, allowing the latex to dry in between layers.

Peel the latex off the mold once it's completely dry. Remove any remaining clay from the inside of the fake mouth. Separate the top of the mouth from the bottom, so the mouth moves up and down as the wearer speaks. You may also need to trim the edges of the fake mouth so it fits the person who will be wearing it.

Apply the fake mouthpiece by brushing a light layer of spirit gum onto both the fake mouth and the mouth of the person who will be wearing it. Hold it in place for 60 seconds. The fake mouth will now stick on it's own. To remove, simply peel off.

Apply facial makeup, such as foundation, on both the person and around the fake mouth. Be sure to blend the makeup where the prosthetic meets the skin.This will make the fake mouth appear more realistic. To finish off the look, apply powder that matches you skin tone.

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