Red purple, purple sand raw materials do not have black, only to add a certain amount of other mineral components to show black, so the market is commonly known as "black mud" price is cheaper.

Purchase of alabaster electric crock pot

Look at the alabaster liner. Select the liner surface smooth, clean, no cracks and trachoma products. Trachoma refers to the small white gray spots in the inner liner, if there is trachoma, outside of the use of a long time, the small air holes may be larger, will make the inner liner in the use of a period of time the formation of small holes caused by the leakage of water.

Listen to the sound of the liner. Tap the liner, listen to the knocking sound is crisp, such as the sound of the flood thick, said the liner may not be enough time to burn, low density, easy to cause rupture. There is also to see, look at the casserole exterior whether there are small air holes, there are small air holes is not good, the use of time is often easy to leak.

Look at the color of the liner. The deeper the color of the inner liner contains more components of alabaster.

Look at the lid. First, look at the lid surface whether there is a small exhaust hole, this hole is to help the pot in the cooking steam diarrhea, to avoid overflow phenomenon in the cooking process. The second is to see the pot cover and pot body degree of coincidence, if gently move the pot cover can be rotated, indicating that the pot cover and pot coincidence if not good, soup pot cover around easy to have gas evaporation.