Cegma is a Sigma pen produced by Chenguang.
Cegma is a brand of Chenguang Stationery, a mid-to-low-end stationery product. Shanghai Chenguang Stationery Co., Ltd. is a comprehensive stationery group in China that integrates creative value and manufacturing advantages and focuses on the stationery business. It is located in Shanghai and went public in 2015.
Fountain pen history
A fountain pen is a writing instrument that mainly uses metal as the pen body. It uses a hollow pen tube to hold ink (mostly black or blue), and uses gravity and Capillary action, and then writing through the duckbill-shaped pen, with different weights when writing, can be said to be the writing tool of Western calligraphy. The ink in most fountain pens is refillable, usually using an eyedrop vial or a straw to refill the ink.
The earliest historical records of water-storage pens can be traced back to the 10th century, and this earliest water-storage pen was used until the 18th century. Development was slow, however, until the early 19th century, when a pen with a steadily accelerating flow was invented during production. Only three key inventions made the fountain pen a widely popular writing instrument. These inventions were: iridium gold nibs, hard rubber, and free-flowing ink.