Good morning, everyone. Today we're going to discuss the history of the postal service. In the 19th century, the introduction of the postage stamp revolutionized communication. Before stamps, recipients paid for mail upon delivery, which was often costly and inconvenient. The first adhesive stamp, the Penny Black, was issued in Britain in 1840. Interestingly, it featured a portrait of Queen Victoria and was printed in black ink, hence its name. However, within a year, the stamp was changed to red because the black ink made cancellation marks difficult to see. This small change greatly improved postal efficiency.
❓ Tại sao con tem Penny Black lại được thay thế bằng tem màu đỏ?
A. A. Để tôn vinh Nữ hoàng Victoria bằng một màu sắc khác