Platinum Biso Fountain Pen Medium

The Biso fountain pen by Platinum Japan 1919 is an elegant and modern writing instrument that combines Japanese precision craftsmanship with a unique design inspired by the depth of space. Its stylish black body with a subtle sheen evokes a starry night sky, giving it a distinctive and refined character. The Biso model features a stainless steel nib plated with gold, available in F (fine) and M (medium) sizes, ensuring smooth, precise writing and comfort in both everyday use and more demanding tasks. The body is made of durable AS resin, making the pen lightweight yet resistant to damage. Its ergonomic proportions – 13.8 cm in length and 12.7 mm in diameter – ensure a comfortable grip. The light weight of 18.4 g further enhances ease of writing, even during extended use. It is an ideal choice for those who value style, quality, and reliability—both for fountain pen enthusiasts and for those just beginning their journey with refined writing instruments. Platinum Pen Co. is a Japanese manufacturer of writing instruments with over 100 years of tradition, specializing in fountain pens. Since its founding, the company has developed advanced technologies such as systems that prevent ink from drying out and precise solutions based on capillary action. The company was a pioneer in introducing ink cartridges and continues to combine modern technology with experience to create durable, functional, and increasingly eco-friendly products.