WarmMark Time Temperature Labels monitor temperature of products during shipping, storage or processing. They provide a quick visual reading if products have been exposed to abusive temperatures, by indicating a progressive measure of how much and how long products have been out of temperature range. For example, a product one degree above range for 10 minutes will give a comparable indication as 10 degrees for 1 minute.

These self-adhesive labels apply directly to product, package, carton or master pack. When activated, irreversible color change occurs once response temperature is reached or exceeded. Red indicates if exposure was for a brief, moderate or prolonged period of time.

These accurate, low cost monitoring tags are irreversible and tamperproof, providing permanent records for quality assurance purposes.