Abstract
In order to examine the solubility of porcelain, three kinds of porcelain were prepared.Then, author steeped it either in alkali or acid solution and a quantitative analysis of dissolved element from porcilain was taken out and then surface roughness with dissolving was experimented.As a result, these are as follows:1)The dissolved quantities of various commercial enamel veneering porclain showed approximate values in each solutions that is acid(pH4.0:I-S), nearly-neutral(pH6.4:II-S)and alkali(pH10.0:III-S).On the other hand, differences in dissolution were recognized according to the kind of dissolved solution.Therefore, the dissolution was the largest in III-S, next in I-S and II-S.2)Much dissolved elements are Si, Na and K.On the other hand, less are B and Al.Ti was not detectable.3)From the measurement of roughness and the observation of SEM, surface roughness of porcelain was apt to be large according to the increase of dissolution.
