Due to the nature of liquids, higher temperatures reduce the viscosity of the liquid dye in Timestrip® PLUS. The correlated result is faster/shorter run-times (the progressing blue dye will reach each printed time-mark sooner than intended). So, if an 8°C/46°F indicator is exposed to 25°C/77°F for a consistent period then the blue dye will progress more quickly through the membrane than if it was exposed to 10°C/50°F for a consistent period.
This graph shows the run-time acceleration of a 10°C/50°F Timestrip PLUS at different elevated temperatures.
The y-axis represents the actual run-time of the liquid dye at different temperatures, and is expressed as a percentage of the specified run-out time at an isotherm of 12°C/54°F. So, at an isothermal temperature of 12°C, the liquid dye will reach each time-marker (1, 2, 4, 8, hours etc) within these times +/-15% in time.
However, if for example the product is exposed to an isotherm of 21°C/70°F the dye will reach each time marker within only 77% of the intended run-time. In other words, it will reach the;
- 1 hour time-marker within approximately 46 minutes (77% of 1 hour)
- 2 hour time-marker within approximately 1.32 hours and so on.
At a less extreme temperature elevation, say 15°C/59°F the blue dye will reach each time-marker at 91% of the intended time.