This is a simple test that everyone in the antiques, collectibles and replacement business should know, plinging.
Plinging is a simple quick way to check china, crystal, stoneware and porcelain items for cracks. All you have to do is hold the item in the palm of your hand (or leave it on a hard surface) and gently tap it with a pen, pencil or similar type item. If you hear a ringing or clear vibration it means that there are no cracks. If the tapping is followed by a hollow sound it is most likely cracked. Test it out. Find a piece of porcelain or crystal that is obviously cracked, then find one that is not and tap them. A little practice will enable you to quickly identify cracked items.
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