Practical mould building

Outline of topics covered, day 3

First coat
de air slurry -prewash -check viscosity and flow onto wax sample -dipping or pouring, plastic sheet for larger pieces -use of brush, blowing -draining -stucco -importance of drying

Second coat
-thinner slurry -stucco -importance of moving air -dry first two coats

Third and subsequent coats
-slurry viscosity same as second coat -larger stucco -4 to 5 coats total -final overnight drying

Back dipping
-after dewax -use of fibreglas

The day is spent applying further shell coats and over-viewing the theory. Moulds used to produce multiple waxes are also demonstrated.

day 4

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