Another cause of sore throat is allergies that promote postnasal drip. There are, however, more serious conditions of the sinuses and throat that may cause the throat to be sore. If you are experiencing an ongoing sore throat, ask your ear, nose, and throat specialist to examine you.
1907: Samuel Simon patented the first screen printing method in Manchester, England, which was most commonly applied to wallpaper and expensive fabrics. He used rubber bands or squeegees, which are still commonly used in the screen printing process today.
It is said that by the 10th century, a skilled printer could print up to 2,000 double-page sheets per day. Performances at the Opening Ceremony of Beijing Olympic Games, 2008, featuring woodblock printing, one of China's greatest ancient inventions. Chinese printing techniques went through a revolution in Song Dynasty, when Bi Sheng (990~1051) invented the movable type printing.