These are two-ply sheets made of Hosho paper, China-made gasen paper, and Inawara paper (slightly off-white). The Inawara paper takes ink very well, and the brush glides smoothly and freely. The China-made gasen paper has a very good balance. Each will result in a very beautiful finish. Hosho paper has a rough grain, which creates a characteristic blurring effect. When using ballpoint pens or fountain pens, you may feel a slight snag, but that is part of the charm of Hosho paper. Of course, you can also use them as regular postcards. My great-grandfather started this handmade washi paper after returning from the Russo-Japanese War. My father is the third generation, and we have a history of over 110 years. Iyo-Saijo, with its clean water, is the perfect environment for handmade washi paper. In the past, there were many craftsmen, and it was very prosperous, but with the aging population, the number of craftsmen has dwindled. This is washi paper that my 88-year-old father carefully and meticulously made, one sheet at a time. My husband and I designed the obi (paper band), and my husband brought it to life, and we both packaged them. This product was made by our family working together. Because it is handmade from start to finish, it is full of a handmade feel and has a very warm finish. There may be fibers unique to handmade washi paper, as well as slight scratches or wrinkles. Although it is a two-ply sheet, the postcard itself is a bit thin. We would appreciate your understanding that this is handmade washi paper. We also have Inawara paper, China-made gasen paper, various sets of 6 types, and large postcard sets. We can also discuss the number of sets. Handmade washi paper Handmade Washi paper Picture letters Postcards Handmade Brush Gansai (Japanese watercolor) Ballpoint pen Fountain pen