HI,
While I was writing my wonderful comment to answer your question, a
researcher locked it - but then gave up. Researchers have to provide
a better documented reply than I will. So ...
Yes, an unglazed (inside and out) porcelain vase will hold water.
Even an unglazed pottery vessel will hold water, one of those reddish
flower pots for example, if you plug the hole in the bottom. The
water may seep through, causing the outer surface to be moist, but it
won't leak. Stoneware is a harder and almost imporous ceramic and
will probably not even become moist on the outer surface.
Porcelain is virtually imporous. It is made of very fine or finely
ground mineral substances (including silicates), which "sinter" when
heated in the kiln (oven) to higher temperatures than those used for
pottery and stoneware. "Sinter" means that the elements fuse,
something that doesn't happen with pottery, but maybe (I'm no expert)
to some extent with stoneware, which is made of a less fine clay with
impurities, whereas porcelain must be made using a very pure material,
kaolin, a rather seldom natural clay.
Your porcelain vase is absolutely water-tight. |
