Is there an easy way to ensure that an alginate impression has set completely?

ImprESSIX Color Change (DENTSPLY Raintree Essix) is pale pink when dispensed, violet when water is added, and dark pink when ready to take the impression. Once the alginate is set, the color turns white to indicate the proper time for removal from the mouth. This alginate provides a foolproof visual method to confirm a complete intraoral set. Additionally, it maintains dimensional stability for five days, if stored in a sealed plastic bag, and can be poured twice with accuracy.