Preparation method of grey black polished thin rock plate

The invention relates to a preparation method of a grey black polished thin rock plate. Comprising the following steps: (1) biscuit pressing; (2) polishing the green body to remove coarse particle powder on the surface of the green body; (3) waterproof bottom glaze is applied in an ink-jet printing mode; (4) carrying out surface pattern decoration by adopting an ink-jet printing mode; (5) spraying double-peak graded glaze by adopting a bell jar glaze spraying device, wherein the double-peak graded glaze is prepared from fine powder glaze, frit particle coarse powder and a composite additive solution; the glazing amount is 800-1300g/m < 2 >; (6) pre-drying is conducted through a hot air dryer, the pre-drying temperature is 120-140 DEG C, and the time is 5 min; (7) firing: the highest firing temperature is 1195 DEG C, and the firing period is 95 minutes; and (8) polishing, wherein the pressure of a polishing grinding head is less than 1.5 MPa. 本发明涉及灰黑色抛光薄型岩板的制备方法。包括步骤：⑴素坯压制；⑵对坯体进行抛光，抛除坯体表面粗颗粒粉料；⑶采用喷墨打印方式施隔水底釉；⑷