when was toilet paper invented in ancient china
Toilet paper Although paper had been known as a wrapping and padding material in China since the 2nd century BC,[2] the first documented use of toilet paper in human history dates back to the 6th century AD, in early medieval China.[1] In 589 AD the scholar-official Yan Zhitui (531â€“591) wrote about the use of toilet paper:
Fountain pen Progress in developing a reliable pen was slow until the mid-19th century because of an imperfect understanding of the role that air pressure plays in the operation of pens. Furthermore, most inks were highly corrosive and full of sedimentary inclusions. The Romanian inventor Petrache Poenaru received a French patent on May 25, 1827, for the invention of the first fountain pen with a barrel made from a large swan quill.[8]