Face and hand casting using Alginate
Information based on my notes made from Tracy Lilley casting tutor for this workshop.
Possible suppliers to try -
Preparation materials: Alginate, moulding plaster, bowls, Hessian scrim, Vaseline, plastic bags, plaster bandage, towels, tissue paper, sponges, gloves, tools, bubble wrap.
Prepare and cover clothes with a plastic bin liner
Cover hair with a muslin scrim
Vaseline facial hair to prevent hair sticking to the Alginate
Mix Alginate, powder into bucket and add water mix fast, very fast with fingers till resembles whipped cream.
Alginate will be pink at first and turn white as it dries
Apply Alginate to face area, it can dry in seconds so move fast, take care not to cover the nose ask you model to let you know if they are uncomfortable by raising there hand. Keep checking throughout application, mask can be easily and quickly removed at any stage if model is uncomfortable.
Alginate can be applied in two stages, this will give you more time, start in the nose area first as this can be the tricky area
Model can smile or have any expression if they wish, they will need to hold that for some time while the Alginate sets.
Once Alginate is set, it only takes a few minutes, add plaster to support the mask use thin layers of plaster & Hessian.
Wait a couple of minutes and remove mask carefully, ask model to screw up face as it is removed
Place the cast on a table; build up sides with clay to hold plaster if necessary, clean edges
Mix plaster (moulding plaster) put water in a bowl, then add handfuls of plaster and mix to a smooth runny paste
Pour in plaster, slow and coat edges, try to avoid creating air bubbles, tap edges of the mould to release air bubbles. If casting a hand pour a small amount of plaster into the fingers, coat the edges first, then pour in the rest of the mix.
Leave for a few minutes up to 10, carefully remove the mould.
File of bits of unwanted plaster
Face and hand casting using Alginate by Chris Follows, Tracy Lilley is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.