Procedure Outline and Notes:
Preparation and Setup Suggestions:
Prepare your work area and model before starting; cut about 4'
off the long end of the drop cloth and cover the model, secure
the remaining portion to the floor if needed. Use two small tables
for materials: DRY TABLE) Precut plaster bandages, alginate stock,
things you don't want to become contaminated. WET TABLE) Buckets
and water for plaster and a place to dip plaster bandages. Locate
the 5 gal. bucket filled 3/4 with warm water in an accessible
area. Use this bucket for water source and cleanup.
Cut the plaster bandages into strips of various lengths ranging
from 24" to 4". It takes about 1 full roll to do one
face. Lay these out in advance. Dipping and Application is easier
if each bandage is folded in half.
Prepare the model mentally, including a developing a means of
communication using gestures or hand signals. Make sure the model
can tolerate being enclosed in materials for the given amount
of time.
Apply the bald cap using medical adhesive and tape.
Apply Vaseline over the hair to ease removal of alginate.
The model should assume the position of the finished piece, i.e.
upright, laying down, head tilted, etc..
Make sure everything is in place and ready before starting!
Face Casts can not be done with the eyes open!
Alginate Application:
Use cold tap water (hard water not softened) to mix the alginate to the consistency of thick pudding. 1/3 lbs. alginate will do a face (no neck or ears). When alginate becomes smooth quickly apply to the face starting with over-hangs, such as under the chin and under the eyebrows. For details in the lips have the model open their lips slightly and close them again. Have the model assume a relaxed and neutral position if required.
Keep air passages open around the nostrils!
Use the stirring sticks and ear swabs to gently work alginate
around the nostrils. Generally keep the alginate about 3/8"
thick in all mold areas especially the nostrils. Periodically
check with the model to make sure they are comfortable. In about
5 to 8 minutes the alginate will start to become rubbery. It
is now time to apply plaster bandages.
Plaster Bandage Application:
Hold both ends of the plaster bandage and dip into the warm water,
don't let go of the ends until you place them on the face. Force
your hands together to wring all excess water out of the bandage.
Apply immediately, starting with large supported areas first
such as forehead and cheeks. Work down to smaller and smaller
bandages. Make sure the nose is well supported while keeping
the nostrils open. Use the ear swabs when necessary to keep water
and debris out of the air passages.
While you are waiting for the bandages to harden, use the ear
swabs to gently clean areas around the outside of the mask. Use
the swabs to separate plaster bandages from the skin, separate
the hair from drying alginate and generally break the outside
border of the alginate. These are all places which might tear
during removal of the mask.
Mold Removal:
To remove the mask, have the model bend over and gently wiggle
the face inside the mask. Gravity and patience will help the
mask drop free from the model's face. Don't force anything, especially
alginate in hairy areas. Alginate will successfully pull off
hair of any length if given time and patience.
Mold Preparation and Casting:
Prepare the mold for plaster by using the clay to sculpt little
plugs to plug the inside of the nostrils. You can use binder
clips or denture adhesive to secure the alginate inside the plaster
bandage shell. Make sure the alginate "sets" well inside
the mold before casting with UltraCal 30.
Mix a small amount of UltraCal 30 and gently brush it into the
alginate. This is your detail coat. You can now follow with thicker
layers of UltraCal 30 until you have a casting the thickness
you desire.
PLEASE NOTE: UltraCal 30 is the industry standard for
heat-resistant, non-shrinking positives that are used for special
make-up effects. Clean all buckets and tools in the source bucket
and allow solids to settle before discarding the water. Place
hardened plaster solids in a trash can.
PLEASE NOTE: You should cast the positive soon after taking
the alginate mold because alginate will shrink as moisture evaporates
out of it. Usually you will get at least one good casting from
the mold before it breaks or tears. Experienced Life-casters
will get several "pulls" before the mold deteriorates.