| 摘要 |
PROBLEM TO BE SOLVED: To provide a plaster wall and ornaments effectively exerting a hormesis effect. SOLUTION: The main raw material of the plaster wall is limestone. The plaster wall surface which is porous and has unevenness is formed by mixing fine powders of limestone with ore powders which have the particle size of≥0.5 time but <5 times that of limestone and emit a trace amount of radiation. The particle size of the ore powder is an important factor for entirely, uniformly dispersing in the limestone powder. By selecting the particle size of the above range, the trace amount of radiation is uniformly radiated from the whole surface of the wall. Further, the ions generated by an ionizing action on the wall surface exert antibacterial and deodorizing effects, and their effects are enhanced by the wide surface area of the porous and uneven-face wall. COPYRIGHT: (C)2006,JPO&NCIPI |
