| 摘要 |
<p>A device and system for indicating the passage of a duration of time and a method of making the same. The timing device is able to be to be more, less or not sensitive to temperature. Additionally, the timing device is able to indicate a level or time of exposure to environmental attributes. The timing device is housed by a sheet body having a scale indicator, a unit indicator, a unit multiplier and a presentation window. As a result, the sheet body enables a user to quickly not only determine if an item has spoiled or a period of time has elapsed, but also how much time is left before spoilage or the time will elapse. The easy to read scale on the sheet body enables accurate judgments to be made on what to do with perishable and other types of items associated with the timing device.</p> |
