Logical prime notebooks are made in Japan and are know for there high quality and fountain pen friendly paper. Each sheet is very smooth especially to the touch which makes writing easier. The notebook covers are made of thick cardstock. So they are soft covers, perfect while writing benethe the paper. Speaking of sheen, Logical Prime notebooks show a good amount of sheen. Logical Wire Bound Line B5 contains 50 Sheets of 75 GSM White Paper with a Green soft cover. Produced by Nakabayashi, a Japanese company founded in 1923 as a magazine binding and book repair business, now maker of some of the best notebooks in the world.