| 摘要 |
<p>PURPOSE:To obtain a sheet for retaining the freshness capable of retaining the freshness for a long period by utilizing properties of TENKO-SEKI (one kind of stone, produced in the northern district of MIYAZAKI Prefecture and containing quartz. soda feldspar, mica, etc.) which is conventionally unknown. CONSTITUTION:This member 10 for retaining the freshness is obtained by mixing powder 12 of TENKO-SEKI having <=3mum particle size in an amount within the range of 0.1-20wt.% in a synthetic resin material 11.</p> |
