Death Masks

Question 1

• Negative Mold
• Positive Mold

Answer 1

Two Castings Are Made

Question 2

A mold made from an object and used for casting a duplicate of that object.

Answer 2

Negative Mold

Question 3

A reproduction of an object which is obtained from a negative mold.

Answer 3

Positive Mold

Question 4

• Quick
• Inexpensive
• Easily Obtained

Answer 4

Advantages of Plaster of Paris

Question 5

Use fresh plaster of paris becuse old plaster will not “set” satisfactorily if it has absorbed moisture from the air.

Answer 5

For Best Results

Question 6

Instead, use:

• Rubber
• Plastic
• Porcelain
• Enamel

Answer 6

Do not mix plaster of paris in a metal bowl

Question 7

Do not _____ the bowl or instruments in the sink.

• Tiny particles of plaster may create a blockage

Answer 7

Clean

Question 8

• Salt
• Warm Water
• Excess Stirring
• Metal Mixing Bowl

Answer 8

Hastens the Setting Time of Plaster of Paris

Question 9

• Vinegar
• Cold Water

Answer 9

Retards the Setting Time of Plaster of Paris

Question 10

• Apply a light oil to the skin
• Cover eyelashes, eyebrows, mustache and hairline with a liberal amount of petroleum jelly.
• Cover cranial hair
• Consider hand and wrist hair

Answer 10

To Preare the Skin and Hair

Question 11

• A bathing cap
• Oiled Paper
• Damp Toweling

Answer 11

Cranial hair may be covered wtih these

Question 12

This hair may need to be shaved

Answer 12

Arm and Wrist Hair

Question 13

It will cause it to be pulled from the skin when removing the mold.

Answer 13

If plaster of paris penetrates through to the hair

Question 14

Their purpose is to confine the wet plaster.

Answer 14

Dams

Question 15

• Clay wall
• Cardboard frame- covered with oil, massage cream, or petroleum jelly to prevent absorption of water.

Answer 15

Types of Dams

Question 16

• 2 quarts- face
• Use coloring
• Add the necessary ingredients to speed upor slow down the setting time.

Answer 16

Place Water in a Mixing Bowl

Question 17

Use to distinguish the mold from the cast:

• Laundry Bluing
• Ink
• Any water soluble pigment

Answer 17

Coloring

Question 18

Methods:

• Flour sifter
• Sift through fingers
• Tap from a spoon

Add plaster until all the water is absorbed.

• Proper mixture will resemble dried mud.

Answer 18

Slowly Sift the Paster-of-Paris Into the Water

Question 19

• Deep stirring- minimizes air bubbles.
• Don’t overstir- the first application must not be quick setting.

Answer 19

Stir the Mixture with a Large Spoon

Question 20

• This step is very important if you are to achieve a good impression.
• Methods of application:
  
  • Brush
  • Flicking it from the fingers
  • Spooning it on
• Air bubbles will cause small holes in the hardened mold.
  
  • These bubbles can be eliminated by blowing on them.

Answer 20

Apply the First Application of Plaster

Question 21

• These layers will supply strength to the mold.
• Apply with a spoon or spatula
• Finished mold- 5/8” thick.
• Determine any thin areas and correct them

Answer 21

Apply the Succeeding Applications of Plaster

Question 22

• Test the plaster
• The mold is removed promptly to prevent dehydration of the tissues as setting plaster generates heat.
• Fresh plaster of paris will harden in about 15 minutes.

Answer 22

Remove the dam as Soon as Possible

Question 23

Roll and fingernail into the plaster, a sharp, clean impression means the mold may be removed.

Answer 23

Test the Plaster

Question 24

• From the hand- by working the fingers free
• From the face- by rocking it from side to side the break the suction.
• Shave any wide edges
• Set aside until the heat has dissipated

Answer 24

Remove the Mold

Question 25

* Check for flaws * Fill any imperfections

Answer 25

Inspect the Inside of the Mold

Question 26

1. Prepare the mold separator 2. Prepare a hanging or attaching hook 3. Prepare a new batch of plaster of maris and water 4. Make a shell 5. Thicken the side walls 6. Saturate square pieces of gauze with plaster mixture 7. Position the wire hook 8. How to make a solid cast

Answer 26

Making the Positive Cast

Question 27

* Fill the inside of the mold with liquid soap allowing it to be absorbed, or: * A light oil is poured into the mold and carried across the thickness of the margins

Answer 27

Prepare a Mold Separator

Question 28

Copper wire properly bent.

Answer 28

Prepare a Hanging or Attaching Hook

Question 29

* A clean container * No salt * No coloring

Answer 29

Prepare a new Batch of Plaster of Paris and Water Using:

Question 30

* Pour plaster into the mold * Carefully, rotate the mold in your hands * Pour plaster back into the mixing bowl * Break any air bubbles * Repeat these steps three times

Answer 30

Make a Shell

Question 31

* Use a spatula and apply plaster to the margins so it flows inward. * Keep the margin of the mold scraped to the level of the cast margins.

Answer 31

Thicken the Side Walls

Question 32

This step is performed to strengthen the mold but it is not essential that it be done.

Answer 32

Separate Square Pieces of Gauze with Plaster Mixture

Question 33

Gently place the wire into the plaster as it begins to harden.

Answer 33

Position the Wire Hook

Question 34

* Make the first few pourings necessary for a shell cast. * Fill the mold with plaster mixture. * Jar several times- to settle the plaster and free any air bubbles. * Position the wire hook as the plaster begins to firm.

Answer 34

To Make a Solid Cast:

Question 35

* Drying time- at least 12 hours * Pour water over the back of the mold to soften it. * Place the mold face down on a soft foundation to absorb the shock of chiseling. * A blunt cold chisel is placed against the margin of the mold at a right angle to the cast. * Strike the chisel with a light mallet- this is done at various positions all around the margin of the mold. * The process is repeated until the edges of the mold break away allowing the remainder to be easily removed.

Answer 35

Removing the Cast From the Mold

Question 36

* Small holes * Hair regions

Answer 36

Making Repairs

Question 37

Scrape plaster from inside the cast and fill the holes with a spatula.

Answer 37

Repairing Small Holes

Question 38

* Scrape down the normal projection. * A pointed instrument is used to etch the hair. * Eyelashes are cut away

Answer 38

Repairing Hair Regions