Introtech
WarmMark and ColdMark, validated irreversible time temperature indicators (TTI) a proven method of ensuring temperature excursions in the coldchain are identified and brought to the attention of the user with no training.
ColdMarkWhen the temperature drops below 0ºC, the clear, colourless, indicator bulb changes to an irreversible violet colour. As different products are affected at different temperatures, ColdMark freeze indicators are available in a choice of threshold temperatures
WarmMarkIf the windows in the WarmMark indicator remain white, there's no problem. If the temperature exceeds the threshold, the indicator window changes to red with time. If the temperature returns to below the threshold, the colour stops changing. In this way, it is possible to estimate how long your product was exposed above the threshold temperature