| abstract |
The core ingot 1 has a core 2 containing an active ingredient, and contains a powdery solid component and coats the core 2 with the outer layer 3. The circular surfaces 2a and 2b of the inner core 2 form openings 8c and 9c which are larger than the average particle diameter of the component having the smallest average particle diameter among the powdery solid components contained in the outer layer 3, and the inner surface 3a of the outer layer 3 is fitted into the opening 8c. 9c. |