How to Make Fake Plaster

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If you want to prank a friend or maybe need a prop for a home movie, making a fake arm or leg cast is a fun way to create the illusion of a broken limb.Using simple materials you can make fake plaster in minutes!
Method 1
Method 1 of 3:

Use a stocking and gauze

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  1. Step 1 Prendi una calza bianca che non ti dispiacerà tagliare.
    This method works well for a cast on an arm, wrist, or ankle.You may also be able to make a leg cast, but you will need several socks, or a pair of taller socks.Find the sock that best suits the cast you want to make.
  2. Watermark wikiHow to Realizzare un Gesso Finto
    Slip the sock over your arm or ankle and make a mark where the cast should end.You can refer to pictures of real chalks to find the exact spot.
    • For the wrist cast you will have to make a mark both at the edge of the hand where the fingers start and on the palm at the point where the thumb originates.
    • For an ankle cast the mark should be approximately where the foot ends and the toes begin.
  3. Watermark wikiHow to Realizzare un Gesso Finto
    Based on the markings you made, cut the sock so that it is the right size for your cast.Don't worry if the heel of the sock creates a small bubble around your wrist, you'll cover it later.
    • If you want to give your cast the right thickness, you can also cut two or three socks of the same size and arrange them one on top of the other, to create volume.
  4. Watermark wikiHow to Realizzare un Gesso Finto
    Once the sock is cut, you can re-thread it where you want to create the cast.This is also the time to align it as best as possible, so position it in the right place for your fingers and arm or leg.
    • If you use multiple socks on top of each other, you should also fold the outermost one a few millimeters, so that you can tuck the edge under the others.In this way the chalk will have a rounded edge, similar to that of real chalks.
    • If you happen to have a relatively smooth wrist or ankle brace, you can slip it under the sock to give thickness to the cast, without having to ruin other socks.
    • Another option is to wrap the area with an elastic bandage before putting on the stocking.Doing so will not only give you the necessary thickness, but it will also make movement more difficult, so you can better play the part of someone with a broken limb.
  5. Watermark wikiHow to Realizzare un Gesso Finto
    This type of gauze is called in different ways, for example you can find it under the names of self-adhesive gauze, gauze plaster, adhesive gauze.The material it is made of is a breathable gauze that is a little sticky to the touch and can stick to itself.Start at the bottom of the sock and wrap it in a thick layer of gauze along its entire length.
    • Make sure you cover the entire sock, except for the few millimeters of the edge that you folded over.Also make sure that the gauze is well stretched, so that it has as smooth a surface as possible, and that the points where it has been overlapped on itself cannot be seen.
    • You will probably need to lay down a couple of layers of gauze to give the cast some thickness, especially if you only used one sock.
    • You can find gauze in different colors, so you can also make a colorful faux plaster.
  6. Watermark wikiHow to Realizzare un Gesso Finto
    Once you finish wrapping the gauze, the cast is ready.To give a more realistic effect you can decorate it like real chalk.Ask someone who knows about the prank to sign the chalk with a couple of different names, and write some wishes for a speedy recovery.
    • If you've made an arm cast and really want to go overboard with the joke (while also making it harder for someone to carefully look at the cast), you can also get a shoulder strap to slip your arm over and rest it on.This way it will also be easier to keep your arm still and convince everyone that it is really broken.
    • For ankle or leg casts, you could also add a pair of crutches to the costume.If you don't already have them at home, you can always buy them used or rent them.
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Method 2
Method 2 of 3:

Use toilet paper and tissue paper

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  1. Step 1 Prendi un rotolo di carta igienica.
    This method of making fake plaster requires a lot of toilet paper, so it's a good idea to use a fresh roll to make sure you have enough.In particular, if you want to make a leg cast you will have to use a lot of paper.
  2. Watermark wikiHow to Realizzare un Gesso Finto
    As with a papier-mâché craft, you'll need to form the plaster a little at a time, so start by tearing a strip of toilet paper about five or six pieces long.
    • To speed up the process you can also double each strip of paper.Then tear another strip the same length as the one you already have and overlap them completely.In this way not only will it be quicker to give thickness to the plaster, but it will also be easier to give consistency to the strips by moistening them.
  3. Watermark wikiHow to Realizzare un Gesso Finto
    You need to moisten the strips well, but don't soak them too much as they will become too brittle and difficult to wrap around your arm.If you have a spray bottle, use it to spray water on the strips rather than dousing them directly with water.
  4. Watermark wikiHow to Realizzare un Gesso Finto
    Regardless of which limb you choose, start by wrapping toilet paper around the top of the area where you want to create the cast.For the ankle you have to start from the calf;for the wrist you have to start from the forearm.
    • We start from the top because it's easier to go around the ankle or thumb when the base is already in place.
    • Don't worry about wrapping the toilet paper at the end, just wrap it around itself to start with.
  5. Watermark wikiHow to Realizzare un Gesso Finto
    Once you wrap the strips around your calf or forearm, add a little water.Use the spray bottle, or spray a little water with your fingers;putting the paper directly under the tap would destroy it.
  6. Watermark wikiHow to Realizzare un Gesso Finto
    With this addition of water, the paper will be more malleable, and the new layers will adhere more easily;however the new strips will not stick if the paper is too wet, so pinch your hand around your calf or forearm and squeeze to remove excess water.
    • Apply direct pressure, because if you pull the paper instead of pressing it you risk tearing it.
  7. Watermark wikiHow to Realizzare un Gesso Finto
    Once the first strip is in place, you need to place a second one of the same size.Glue one end of the strip to the piece of chalk you just created.The moisture present should be sufficient for the new layer to adhere.Add more water and squeeze out the excess.
    • You will need to repeat this step until the plaster is the thickness you want, which will probably be three or four layers.
  8. Watermark wikiHow to Realizzare un Gesso Finto
    Once the upper part of the cast is in place, you can move towards the wrist or ankle, depending on which limb you have chosen.Using a double strip the same size as before, moisten it and carefully wrap it around the joint.
    • You'll have to try to keep your ankle at a 90-degree angle from now on, otherwise you risk tearing the toilet paper.
    • For the wrist and hand, you need to wrap the toilet paper starting from the wrist and around the palm (so that it passes between the thumb and forefinger), then on the back of the hand and finally on the palm again (this time, however, passing outside the thumb).This way you will have realistic hand coverage, leaving your thumb and fingers free just like with a real cast.
    • You will need to repeat this step until you are happy with the work, it will probably take the same number of layers as you used for the top.
    • Remember to always keep the paper strips moist, and squeeze out the excess water at each step.
  9. Watermark wikiHow to Realizzare un Gesso Finto
    If you want to create the illusion of colored chalk, you can take a color of tissue paper of your choice and wrap a layer or two of it around the toilet paper until you are happy with the result.
    • Be very careful when placing tissue paper on top of damp toilet paper, because tissue paper is even more fragile.
  10. Step 10 Aspetta che il gesso asciughi.
    Once you're happy with the results for both toilet paper and tissue paper, you'll just have to wait for everything to dry.As toilet paper dries, it hardens, giving the cast a more realistic appearance.
    • If you're in a hurry you can also use a hairdryer to speed up drying.
  11. Step 11 Ricordati di tenere sempre dritto l'arto.
    Toilet paper can tear easily, so you need to remember to keep your wrist and ankle still when wearing the cast, any movement could break it.
    • Using a pair of crutches for your ankle cast is a good way to make the prank more believable and to avoid bending your ankle.
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Method 3
Method 3 of 3:

Use toilet paper and gauze

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  1. Watermark wikiHow to Realizzare un Gesso Finto
    Take the top half (where your fingers should be) and make sure it fits completely over your arm;you also need to make a thumb hole about halfway down.
  2. Watermark wikiHow to Realizzare un Gesso Finto
  3. Watermark wikiHow to Realizzare un Gesso Finto
  4. Watermark wikiHow to Realizzare un Gesso Finto
    You can use toilet paper, kitchen paper, felt strips, etc.Leave room at both the top and bottom edges (where the sock pieces are placed).
  5. Watermark wikiHow to Realizzare un Gesso Finto
    Wrap tape around the soft material, leaving room at both the top and bottom edges (where the sock pieces are placed).
  6. Watermark wikiHow to Realizzare un Gesso Finto
    Wrap more soft material around your arm, leaving room at both the top and bottom edges (where the sock pieces are placed). It also goes around the thumb.
  7. Watermark wikiHow to Realizzare un Gesso Finto
  8. Watermark wikiHow to Realizzare un Gesso Finto
    Let some sock show.
  9. Watermark wikiHow to Realizzare un Gesso Finto
  10. Watermark wikiHow to Realizzare un Gesso Finto
    At this point you can write on it with markers.
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Advice

  • Making your own fake plaster is fun, but you can also order one online as they are very cheap.
  • Remember not to move your wrist or ankle (depending on where you put the cast) because you will be exposed.
  • Do not cover your fingers with a wrist cast.Simply wrap it around your palm.
  • Make sure not to get the fake plaster wet.
  • Adding a shoulder strap or crutches to the joke will make it much more believable.
  • Avoid people with real casts, because by comparison it may be obvious that yours isn't real.
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Things you will need

  • Toilet paper
  • Colored tissue paper (any color)
  • Hairdryer
  • Waterfall
  • Sock(s).
  • Scissors
  • Self-adhesive gauze


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