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METHODS Ol' TAKIXC I M I'KlvSSIONS. 9
2. The plaster shoni*! llicii be spriiilclcd into the water
by tapping;" tlie s[)atula on the edge of the bowl; this will
allow the air which is always found in plaster to escape
before the jilaster sinks. Idiis sprinkling process should
be continued until all the water is taken up; or when a
sutticient cpiantitv for the ease in hand has been added,
pour off the surplus water, then add what plaster can be
Fig. 3.
conveniently carried on tbe spatula. This will usually give
the proper consistency for taking impressions, that is, just
thick enough not to run off an inverted impression cup or
the spatula.
3. The mixture should then be quickly and thoroughly
stirred for about ten seconds, so that every particle of plaster
has an opportunity to absorb the proper amount of w'^ater.
