METHOD OF BLACK CERAMICS PRODUCING Russian patent published in 1998 - IPC

FIELD: building materials. SUBSTANCE: invention relates to production of ceramic articles made of rough and fine crock of black color. Method involves preparing a charge with carbon-containing additions: starch, or sucrose, or flax oil taken at amount 1-5% by mass followed by forming, drying and roasting at the following regime: heating to 400 C under atmospheric pressure, heating to 900-940 C, isothermic exposition and cooling to 500 C under pressure 13.3-0.13 Pa and the following cooling under atmospheric pressure before articles unloading. Method provides producing the uniformly stained ceramic articles for all deep of crock. EFFECT: improved method of producing and quality. 1 tbl