... automatic encaustic tile machine. WZ-2800 stone powder roof tile forming machine www.midbm.com.cn ... uses local materials.stone powder:precipitated calcium carbonate powder, triple concentrated superphosphate powder, talcum powder, quartz powder, mineral powder, shale, mine tailing ... ,sawdust and so on.Product advantages1.Not containing formaldehyde, benzene and other harmful materials, green building ...