How to identify crystal glass cup and glass water cup?
1, By hand.
Crystal heat conduction performance is stronger than glass, so when you touch the crystal glass cup should feel cool than touching the glass cup.
2, See the hardness.
A Crystal cup up against the light rotation, you will find glass crystal clear, able to refract light. Ordinary glass no gloss, no refract.
4, Listen to the sound.
Tapping or with fingers hit utensils, Crystal glassware to make crispy metal sound, while ordinary glass muffled sound.
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