Hanji, meaning "Korean Paper," is a handmade paper that uses the tool called "Hanjibal" with paper mulberry as its main raw material mixed with water and hibiscus. There are various stories about the origin of the word, "Hanji." As stated above, the name Hanji could imply Korean paper by using the letter "Han" with the meaning "Korea" in Hanja, or it could connote the fact that Hanji made in winter is better quality, so the letter "Han" is defined as cold in Hanja. Hanji was also known as "Back-Ji" with the letter "Back" meaning white in Hanja since Hanji is clean and white, just like Koreans being represented as the white-clad race.
Another reason why Hanji was named "Back-ji" is that the word "back," meaning 100 in Korean, implied that Hanji required 100 times of effort. The name that should be pointed out is "Hanji" with the letter "Han," meaning cold in Hanja. Those who completed the busy farming season between spring and fall harvest young paper mulberry bark during the relaxed winter season (November to February). As mentioned above, Hanji made of the paper mulberry bark harvested during that season are the best quality, so it was named with "Han(cold)." Especially the paper mulberry bark cut in the cold winter is stabilized in terms of composition.
Furthermore, since the temperature is low, it does not diminish the viscosity of hibiscus. (Hibiscus tend to lose its viscosity in high-temperature condition) Therefore, Hanji made in this season can be sustained the longest due to its fiber entanglement that results in high-density and robust paper.