Soft cover notebook 68g/m² - white paper - plain Size: B5 (181 mm x 256 mm) 160 pages Sanzen Tomoe River paper is highly appreciated by fountain pen and calligraphy enthusiasts due to its writing experience. Sakae Technical Paper has just released a limited edition of B5 size soft cover notebooks using Tomoe River paper manufactured by Miyoshi Paper. For this limited edition, unlike the usual 52gsm paper, the notebook is made with a thicker paper (68 gsm). To fully enjoy the fountain pen ink, the pages are blank with no printing.