Maruman Mnemosyne A4 Notebook - Lined (Black) The Maruman Mnemosyne A4 Notebook is designed for professionals, students, and creatives who need a high-quality, well-organized writing tool. Named after the Greek goddess of memory, this sleek and sophisticated notebook offers smooth, acid-free paper perfect for fountain pens, ballpoints, and pencils alike. With 70 micro-perforated sheets, each 7 mm lined page includes "Title" and "Date/No." sections for effortless organization. Three bold dividing lines create four structured sections, making it easy to categorize ideas, notes, or projects. The sturdy twin-ring binding ensures the notebook lays flat, while the durable black plastic cover protects your pages from daily wear. Key Features: A4 size (11.7" x 9.2")—ideal for detailed notes and professional use. 70 acid-free, fountain pen-friendly sheets to prevent yellowing. 7 mm gray ruled lines with three bold dividers for better organization. "Title" and "Date/No." spaces for easy reference. Twin-ring binding allows the notebook to lay flat. Micro-perforated pages for clean and easy removal. Durable black plastic cover provides protection and a professional look. Specifications: Manufacturer: Maruman Binding: Twin Ring Cover Color: Black Cover Material: Plastic Cover Type: Softcover Features: Acid-Free, Fountain Pen Friendly Line Spacing: 7 mm Number of Lines: 36 Number of Sheets: 70 Paper Refillable: No Paper Weight: 80 gsm Perforated: Yes Perforated Sheet - Length: 29.7 cm / 11.7 inches Perforated Sheet - Width: 21.0 cm / 8.3 inches Sheet Color: White Sheet Style: Lined Size - Depth: 1.4 cm / 0.6 inches Size - Length: 29.7 cm / 11.7 inches Size - Width: 23.3 cm / 9.2 inches Standard Paper Size: A4 Weight (Without Packaging): 17.42 oz / 494 grams