After casting an ear, we then moved on to casting a hand, the method for this is the same as when we cast the ear, just on a slightly bigger scale. This hand cast then can also be used to create a bespoke prosthetic and can also be used in the film and television industry. Below are some pictures of the hand cast being made along with the method.
- 2lt bottle
- Plastic sheet
- Cut the top of a bottle
- Put the bottle on a chair (put it at that height that is comfortable for the model)
- Vaseline can be applied to the hand if it is dry to give some slip
- Fill the bottle with water, about an inch or so from the top and pour into a bucket. (the bucket should be on a plastic sheet on the floor)
- Mix the alginate up (see ear casting post) and pour it into the bottle. Pour a small amount into the bottom first, and then get the model to put their hand and continue to pour the rest in.
- Let the alginate set
- Once it has set, get the model to wriggle their hand out of the alginate while you pull on the bottle to also help release the hand
- Mix up the plaster
- Pour a small amount of plaster into the alginate mould, and coat the side of the cast. Then pour in the rest if the plaster, and over the top of the alginate to create a base for the positive of the hand cast.
- Once the plaster has set, cut down the side of the plastic bottle and remove it, leaving you with the alginate and the plaster inside. Gently remove the alginate, by pealing it off little by little until you are just left with the plaster hand.
- Once the plaster hand is left with no alginate on it, it can then be filed and smoothed down to remove any lumps or bumps.
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For our first full lesson back for creature design, we had to create a cast of an ear. The ear, once it is cast will then is used to create a prosthetic for our creatures we will be designing. Before we can make the positive of the ear out of plaster, we first had to use alginate to make a negative of the ear. To make the negative of the ear we had to plug the ear using cotton wool, the pour the alginate in to the ear using the top of a paper cup to hold the mould of the alginate ear. Once the alginate is set you can then make a positive of the ear out of plaster. After the plaster is set the ear is then ready to be sculpted on to, so that a desired effect can be created. The process of this a cast can be used in the film and television industry, to make a bespoke prosthetic for an actor. Below are some pictures of the ear cast being made and the method.
- Cotton wool
- Paper cups x2
Making the alginate negative
- Lie model down on one side a flat surface
- Put ear through cling film
- Vaseline the edges of the cling film down
- Put cotton wool in the ear, to block the alginate from going in the ear
- Make a wall around the ear with the large end of a paper cup
- Put tepped/room temperature water into a large bowl, (As alginate only has a short working time, around 3 minutes, you have to work fast when using it.)
- Pour the alginate into the bowl of water (this is probably a two man job, so get a friend to pour the alginate while you mix) and mix together with an electric mixer, until it’s at a watery porridge consistency, this is when it is ready and you will have to be fast pouring it in to the ear.
- Pour alginate into ear, start by pouring behind the ear, until the ear is full submerged by the alginate. Make sure to put paper towels around the bottom of the cup to stop any leakage.
- Put a finger in the ear and move it around to remove any bubbles in the alginate
- Leave the alginate for about 5 minutes, until the alginate goes solid.
- Remove the paper towel, the cup from the ear. ( to remove, pull the cup gently push it towards the back of the head, and then wiggle upwards to remove).
Making the plaster positive
- Cut another paper cup in half and place on top of the other cup.
- Use a couple of pieces of Modrock to hold the two cups together, and use clay to re-enforce the join of the cups and to stop the plaster from leaking out.
- Mix up plaster
- Pour the plaster into the new mould with the alginate ear in. Pour the plaster to the side of the ear and move around to get the plaster into the ear, remove any air bubbles by gently shaking the mould, then continue to pour plaster into the mould, to give it a good base.
- Once the plaster is set, remove the clay and modrock from the outside of the cup and then cut away the remaining of the cups. Once the cups have been removed, gently pull away the alginate, which will then reveal the plaster casting of an ear.
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After completing our initial face cast, our second lesson consisted of making a base to help keep the cast sturdy while sculpting. Below is the method of how we did it along with some pictures
- Modrock Plaster Bandage
- Plaster Dust
- Wax Loosening Agent
- Dust clay board with plaster dust
- Slice clay and place on the board and overlap each piece
- Smash the clay down flat and cut of top with cheese wire to smooth out surface and remove from the board.
- Place pervious face cast on to a wooden board and draw a circle 2 – 3 inches around it.
- Soak face cast in a bowl of cold water (only enough to cover the sides of the mask)
- Slice the piece of clay into 2-2 ½ inches wide to create a clay wall.
- Seal clay to the board to prevent leakage
- Apply Modrock plaster bandage about a foot long and wrap around the clay wall to give it support and strength when the plaster is poured in.
- Inside of the clay wall paint wax loosening agent onto the board to prevent plaster form sticking
- Pre-cut two pieces of scrim about the size of the wooden board
- Mix up plaster, make it up a little thicken than last time
- Tip a little plaster into the walls you have just made, add both pieces of scrim and pat down into the plaster so that all edges have been covered and that nothing is hanging over.
- Top up with the rest of the plaster but not right to the top, making sure that no scrim is showing – Also shake the plaster to make sure there are no air bubbles and that the plaster is level
- Place soaked face cast onto the in the centre of the plaster and leave to set
- If there are any holes around the edge of the face once you have put it in the plaster, you can fill it in with thicker plaster once the base has almost set
- Once set remove the clay and modrock wall, file the new cast down to make it smooth and remove any uneven areas on the face.
- Drill four holes, two on each side which will be used for guidance later on in the process of prosthetics making
- Apply shellac all over the cast until shiny
- Once the shellac is dry you are then ready to sculpt
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This semester in special effects we are going to be learning about prosthetic’s, but to be able to create prosthetic’s we need to create a face cast to work off. Also in special effects this semester we have the privilege to be tutored by a member of the Madame Tussauds casting team. In our fist lesson we were being shown how to create a face cast using Mouldlife Life Form Face Coat and Modrock. Face casts can be used in various areas of make up such as film, television and theater. Once the face cast is produced then prosthetic’s can be made and molded to fit an actors face. Below are some pictures of the process along with a method of how we created the face casts.
Mouldlife Life Form Face Coat Part A & B
Modrock (Plaster Bandage)
- Mark an out an outline on the face of where you would like the cast to be.
- Cove up the model with a plastic sheets and gaffer tape to secure the back to prevent anything falling.
- Mix together both A and B parts of Mouldlife Face Coat (Half and Half).
- Roll mixture onto the skin taking extra care around the eyes and nostrils (DO NOT cover the nostrils as this allows the model to breathe throughout the process) Apply a good layer all over the face.
- Apply gauze on top of the face coat, over the eyes and mouth.
- With a bowl of warm water, fold the Modrock in half and put into water and remove any excess water and apply to the face covering the gauze and all the face coat, once you have covered most of the face with Modrock apply a strip around the sides of the face and one down the nose giving the cast more support.
- Allow the Modrock to set.
- Using a blunt modeling tool, remove the face coat and Modrock by getting the tool between the face coat and the skin ( to help with removing the face cast get the model to move their face).
Using Plaster to fill Face Cast
- Cover the nose of the Face Cast with a flat piece of clay and fix the face cast to the board with more clay to secure and keep level.
- Cover any visible plaster and bandage with Vaseline.
- Pour a cup of cold water into a bowl and add a handful of plaster, sieving it into the water using your hands.
- Allow plaster to soak into the water before mixing to a single cream texture (when plaster starts to rest on top and looks like thick wet sand then it’s ready to mix).
- Use hands to mix plaster and to get rid of lumps.
- Brush layers of plaster until no green rubber is showing ( the plaster may repel due to grease from rubber or skin/make-up).
- Continue to paint the plaster until a thick layer is applied and allow to dry.
- Once the first layer of plaster is dried, spray with some water to help the next layer of plaster adhere.
- Paint another layer of plaster and add scrim (fabric) and then add another layer of plaster on top of the scrim be careful not to create any air bubbles.
- After the final layer has dried use a blunt tool between the rubber and the plaster and gently remove the face cast and tidy up any scrim that may be hanging over the edge.
Sorry for such a long post, thanks for reading