In 1837, Sir Rowland Hill, one of official leader of England Post Office realize that both of sender and receiver always refuse to pay postal cost, event the letter has delivered to receiver.
To avoid lose out, he release a stamp, one piece of paper that have substance a postal letter priced. The first design of stamp well known as The Black Penny, cause have value one penny and black color. Second stamp is well known as The Blue Penny, have value two penny and designed in blue color.