Refers to a physical stamp or mark of authenticity, quality, or origin, often on metal or goods. Also used figuratively for a distinctive mark or characteristic.
Used for a mark of disgrace or a negative reputation, similar to being branded. Often in expressions like 極印を押される (to be branded/stigmatized).
This silverware has a hallmark stamped on it.
His works bear a distinctive stamp.
He was branded as a criminal.
The incident gave the company a bad reputation.