... ,CE certification 4.2 years Dustless Chalk Making Machine With OEM/ODM Service (1) Application:::chalk making or production,applied ... make sure there is enough oil, especially the new moulds.2. Check out the screw on the ... water in the water tank as all out. For new mould, should add the gypsum first, then fill ... . It will takes longer time if it’s new mould, make sure the chalks are all solidification ...