Gim (김), sometimes spelled kim, is a Korean-style edible seaweed in the genus Porphyra, similar to the Welsh-style laver and Japanese-style nori. Hanja is the Korean name for Chinese characters. More specifically it refers to those Chinese characters borrowed from Chinese and incorporated The Revised Romanization of Korean is the official Korean language Romanization system in South Korea. McCune-Reischauer romanization is one of the two most widely used Korean language Romanization systems along with the Revised Romanization of Korean, which This article is about the traditional culture of Korea. For the modern culture see Culture of North Korea and Culture of South Korea Seaweed is a loose colloquial term encompassing macroscopic Multicellular, benthic marine Algae. Porphyra is a foliose Red algal genus of laver, comprising approximately 70 species Laver is an edible Seaweed that has a high Mineral salt content particularly Iodine and Iron. For a topic outline on this subject see List of basic Japan topics. Nori (海苔 ( 김 kim or gim) is the Japanese name for various edible Seaweed species of the Red alga Porphyra
When eaten as a banchan (small side dish), it is roasted with sesame oil and salt seasoning. Banchan also spelled panchan, refers to small Side dishes served along with cooked rice in Korean cuisine. Sesame oil (also known as "gingelly oil" or "til oil" is an edible Vegetable oil derived from Sesame seeds Besides being used as a Cooking For use in gimbap, the sheets are not roasted. Sheets of gim are thinner than nori sheets.
Gim has high content of mineral salts, particularly iodine and iron. A mineral is a naturally occurring substance formed through geological processes that has a characteristic chemical composition a highly ordered atomic structure and specific Salt is a Dietary mineral composed primarily of Sodium chloride that is essential for Animal life but toxic to most land plants Iodine (ˈaɪədaɪn ˈaɪədɪn or /ˈaɪədiːn/ from ιώδης iodes "violet" is a Chemical element that has the symbol I and Atomic Iron (ˈаɪɚn is a Chemical element with the symbol Fe (ferrum and Atomic number 26 It is prepared into very thin, dried square sheets, seasoned with sesame oil and salt. Sesame oil (also known as "gingelly oil" or "til oil" is an edible Vegetable oil derived from Sesame seeds Besides being used as a Cooking It is served toasted and cut into smaller squares as a side dish, or rolled to make gimbap. Gimbap or kimbap is a popular Korean "fast" food made from steamed white rice ( bap) and various other ingredients 
There are about ten varieties of gim in Korea. The most common are chamgim (Porphyra tenera) and bangsamuni gim (P. yezoensis). Others include dungeun gim (P. kuniedai), dungeun dolgim (P. suboriculata), and momuni gim (P. seriata). 
Gim is thought to have been eaten at least since the Unified Silla period. Unified Silla ( 668 CE - 935 CE or Later Silla is the name often applied to the kingdom of Silla, one of the Three Kingdoms of Gim was cultivated in Korea since the mid-Joseon period, mentioned in texts dated 1420, as a local product of the Jeolla district. Jeolla ( Jeolla-do in Korean formerly spelled Cholla or Chŏlla) was one of the eight provinces of Korea during the Joseon Dynasty It was recorded in 1429 that gim was sent to China. China ( Wade-Giles ( Mandarin) Chung¹kuo² is a cultural region, an ancient Civilization, and depending on perspective a National  A 1650 record describes it as very expensive.  Various new techniques of cultivation developed in 1600s and 1800s. 
In 1980, Ungjin's chamgim was designated Natural Treasure Number 134 by the South Korean government. Ungjin, also known as Gomnaru ( Hangul: 곰나루 literally " Bear port" is a former city on the Korean Peninsula.