| 摘要 |
<p>Provided is a time temperature indicator (TTI) system/device for monitoring a thermally sensitive product, such as foodstuff, food additives, chemicals, biological, materials, drugs, cosmetics, and so forth, which are handled and stored at temperatures between about 2°C and about 40°C. The TTI system of the present invention is activated by contacting with each other a reactive ink layer comprising microorganisms, for instance, yeasts, in a water-based vehicle printed on a plastic film and an adhesive layer comprising an activator, specific for the microorganisms, printed on another plastic film. The activated TTI that is affixed to the product to be monitored indicates the time temperature history of the product by the color change of the color indicator, contained in the TTI system, caused by fermentation of sugars by the microorganisms.</p> |
