Page 165 - My FlipBook

SILICATE IN THE MAKING OF A FILLING 161

Crowd this into position and hastily get a partial contour. Im-
mediately pat or paddle the material to complete contour, continu-
ing until the material has been crowded slightly over the margins.
This paddling force will jar the material so as to bring back the gloss,
as produced by patting on the slab. In case the gloss is not produced
by the paddling, a homogeneous mass is not secured and the
fill-

Fig. 101.—Proper consistency of silicate, for immediate introduction into the cavity.

Fig. 102.—This mix of silicate is yet too thin and there should be more powder added.
The material should show a tendency to follow the spatula when moved from the slab but
it
should not follow the spatula as here shown.
ing will lack proper color, will be of poor edge strength, and will
make a very weak filling. If the gloss has been produced by the
paddling or jarring of the material, it should be alloAved to remain
undisturbed until the process of setting has sufficiently taken place
that the body of the filling will not be moved by any work upon
its surface. '