The chromatic phase indicator helps with the preparation of impressions without having to worry about temperature changes or specific water hardness. Temperature changes modify working and setting time and the color indicator will change accordingly. The chromatic phase indicator is a guarantee for perfect mixing and timely insertion in the oral cavity. After mixing water and powder, the compound color turns to Purple, it is time to mix. Pink indicates the time to pour the compound in the impression tray. The white color indicates the time to insert the tray in the oral cavity.