They are ideally suited for temperature monitoring of products and processes where a specific temperature should not be exceeded, such as for moving or small objects or for long-term monitoring. The temperature mini-indicators are delivered in a booklet containing 10 pieces each. They can be easily peeled off the booklet like stickers and adhered to the object being measured. The coloration is irreversible: once the temperature has been exceeded, the mini-indicator does not revert to its original color, even if the temperature drops again. This allows for the detection of critical temperature exceedances even after a long period.