| 摘要 |
<p>A temperature supervision and display unit is provided with micro-capsules, each containing a hydrophobic organic material of any melting point, and a methine coloring matter and an oxidizing material which are retained on a carrier. More specifically, a unit which is used to supervise temperature is provided with a methine coloring matter which irreversibly changes color and an oxidizing material, combined with micro-capsules containing a hydrophobic organic compound of a predetermined melting point, and these are retained on a carrier. It is preferable to form cracks in the micro-capsules of the unit below the desired supervision temperature, and then place the unit with the article whose temperature is to be controlled when the article is being stored or transported. Thus, when the temperature of the article exceeds the desired supervision temperature, the nonvolatile organic compound emerging from the bust micro-capsules melts and diffuses to bring the methine coloring matter and oxidizing compound which are adjacent to each other into contact with each other, causing an irreversible color change in the coloring matter. This color change makes it possible to detect an abnormality in temperature conditions.</p> |
