A deathmask is used to create masks and prosthetics for stage make up, that fit perfectly on your face.

Step 1: Ingredients

You will need:

plaster (gypsum) (1kg / 35oz)
alginate (½kg / 17oz) - can be bought on dental supply stores
plaster bandage
plastic film
a long piece of fabric
facial moisture or solid vaseline
a scissor
a spoon
two small bowls
a box ou plastic bowl with sand
water
a friend to help you

Step 2: Preparation

Lay your friend on a comfortable place that can be soiled - the floor or a large table. Wrap his or her head with plastic film, protecting the hair; it will get the aspect of a bald person. Moisture his or her eyebrowns and eyeleashes. Tie the fabric around his or her head. It will define the depth of the mask, because it's the fabric that will stop the alginate from draining. Try to keep the fabric as low as possible, just like the picture.

Step 3: Pouring Alginate

Now you will prepare the alginate, that will be poured over the face of your friend. Remember to protect the nostrils, because he or she will have to stay with it on his or her face for some minutes, breathing only through the nose. You may cut a straw in half and insert them on the nostrils - so the alginate won't fall into the nose - or just be careful when pouring the alginate, leaving the nose last and protecting the nostrils with your fingers - just remeber to ask your friend to take a deep breath before you do it! Sometimes a little alginate can fall into the nostrils, but you can take it off carefully, and your friend should never inhale it.

Ready? Use 1 liter water for half a kilo alginate, or 33 fl oz water for 17 oz alginate. Pour the alginate into the water and start mixing with a spoon. It will start to harden when start changing its color from pink to white. When it happens, pour it over the face of your friend, being careful with the nostrils. You must be very quick, or the alginate will harden. If it hardens before you pour it, it can't be used anymore, and you must start the mixing again. If you pour it correctly but cannot fill all the parts of the face, you can make more of the mixture and pour again in the parts that are lacking.

Step 4: Placing Plaster Bandage

Now your friend must remain with his face covered for a while. Some people may find this experience a little bit scary and uncomfortable, so he or she may try to keep calm and breath deeply, and try not fall into despair. Some people relax easier with a song playing, or if someone keeps talking to them, just so they know there's someone there.

You will now start to put the plaster bandage over the alginate, so it won't break when took off. Cut some strips with the scissor, then dip it into the water, place over the face of your friend, and slide your fingers to release the plaster. You may cut smaller strips for the nose area, remebering always to keep holes for your friend to breathe. Make two layers and wait for it to drain - the draining time depends on the climate.

Step 5: Preparing for Filling

While the plaster bandage dries, pour the sand into a large plastic bowl or any recipient in which the mask will fit, and make a hole on the sand: this is where you will put the mask.
When the plaster bandage gets completely dried, ask your friend to put his hand over the mask and sit. Looking down, he or she may now take off the mask carefully, and place it on the sand, like in the picture (alginate upward). Place the sand all over the mask, taking care not to distort it. Cover the nostrils holes with some more plaster bandage.

Step 6: Filling

Now prepare the plaster (1 kilo plaster for 1 liter water, or 35 oz plaster for 33 fl oz water), mixing it with a spoon. Start pouring it into the mask with the spoon, letting it drain through the sides. This is for preventing bubbles in the plaster. Make one layer this way, then pour the rest of the plaster into the mask, and let it dry before taking the mask out of the sand. Depending on the type of the plaster it may dry in 15 minutes or 12 hours - check the package for this information.

Step 7: Revealing and Correcting the Mask

After the plaster is dried, take the mask out of the sand and place it on a flat surface. Take off the sand, plaster bandage and alginate carefully. Your mask is almost ready! You can use any sharp tool to make the nostrils again and correct any imperfections in plaster. Just be careful not to cut too much! Here we use a dental pick. After this, let it dry a little bit more, in the sun if possible.