Inquiry (采购产品): Cement tile testing We are tile manufacturers located in New York City. We manufacture ceramic and cement tile. Every so often a white powdery/calcified substance comes to the surface of batches of our cement tile. This substance is very difficult to remove and ruins the batch of tile when it occurs. We are searching for the cause and subsequent solution to this problem. If this is a service your company provides, we would like to send you some cement tile to be tested. Please contact me with more information. **** Hidden Message ***** Jaime Pfost 10010 Company: Mosaic House E-mail: contactus@mosaichse.com **** Hidden Message ***** contactus@mosaichse.com