INGENUITY AND LUXURY 



But should they find any, they reinforce the thin spots 

 with glaze applied with a brush, or cut off the excess 

 with a thin, sharp knife. 



Another method of applying the glaze is by "sprin- 

 kling," which is used for pieces that do not suck up the 

 glaze readily, or on those whose interior surface is to 

 be glazed a different color from the outside. In such 

 pieces the outside is dipped in the ordinary way, the 

 glaze for the inside being introduced by a spoon, 

 or ladle, which is then run around so as to cover all 

 the surface, the excess being poured out. 



Glazing by volatilization or "smearing," as it is 

 called, is a process by which the glaze is applied while 

 the ware is still in the biscuit-oven. In this process the 

 saggers are either left open, or the glaze to be vola- 

 tilized is placed in a cup in each sagger. As this vola- 

 tilizes it combines with the silica in the ware, forming a 

 coating over it. This method is used for pieces with 

 sharp outlines which might otherwise be filled or 

 rounded by the dipping process. So-called stone- 

 ware is glazed by throwing salt into the oven when it 

 is well heated, and as this volatilizes it combines with 

 the silica in the ware to form the glaze. 



Very cheap ware is sometimes glazed by dusting 

 dry powdered glaze over the ware while it is still damp 

 enough to hold it. Only one firing is then required 

 to finish the piece. Such ware is of very inferior 

 quality, and the process is very hurtful to the work- 

 men who breathe the air loaded with the fine particles 

 of the glaze, some of which are of a very injurious 

 composition. 



[268] 



