因为这种瓷料是陶瓷质地的，看起来像玻璃，与老式的物料不一样，其表面是光滑而且具有非渗透性，咖啡，茶叶红酒或是抽烟等都不会在其表面形成斑点。
Since porcelain is ceramic, and therefore glass-like, its surface is smooth and impervious and unlike older bonding materials, it will not be stained coffee, tea, red wine or cigarette smoking.
遗憾的是，当外源(非母体)蛋白质进入婴儿的渗透性肠道时，可能会带来严重的健康问题。
Unfortunately, serious health problems can develop when foreign proteins are allowed into the infant's permeable intestinal tract.
在自然界中也发现有其他非渗透性薄层物质。
Thin layers of other impermeable materials are found in nature, too.
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