C5 Innovative Transparent Press-Type Piston Fountain Pen

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✨ Core Innovation Highlights: Press-Type Piston Ink Filling System

1. Highly Efficient Ink Filling, 99% Ultra-High Fill Rate

• Utilizing an innovative press-type piston vacuum ink storage structure, inspired by a one-way water inlet valve, ink is quickly filled via a press-type device at the tail, eliminating the need for the rotating operation of traditional piston pens. The ink filling process takes only a few seconds.
• The transparent barrel allows for easy viewing of the ink filling status. With an ink filling rate of up to 99% and virtually no air residue, it achieves a truly "full ink state," providing significantly longer battery life than ordinary fountain pens.

2. Large Ink Capacity, Say Goodbye to Frequent Refills

• The fully transparent acrylic barrel allows the internal ink storage space to function directly as an ink tank. A single pen can store far more ink than a typical fountain pen, enabling writing of several kilometers on a single fill, meeting the high-frequency writing needs of daily practice, office work, and study.
• The transparent barrel design allows for clear visibility of the ink color, making it highly visually appealing when paired with colored inks, making it a popular choice for "colored ink enthusiasts."

🎨 Appearance and Craftsmanship: A Luxurious and Transparent Aesthetic

1. Transparent Pen Body + Gold-Plated Celtic Pattern

• The pen body is made of high-transparency acrylic material, with no unnecessary obstructions, fully showcasing the internal piston and ink tank structure, maximizing both mechanical feel and transparency.
• The pen body features a three-section gold-plated Celtic pattern ring, and the clip uses a matching glossy gold-plated finish, paired with a transparent crystal-like end cap. This perfectly blends a luxurious retro style with modern transparent design, resulting in a visually appealing piece.
• The pen cap is a screw-on design, and the transparent cap allows a clear view of the nib. The gold-plated clip on the cap is both practical and aesthetically pleasing, easily clipping to a notebook or pocket.

2. Ergonomic Grip and Detailed Finish

• The pen grip is made of resin, conforming to the curvature of the fingers for comfortable writing over extended periods. The moderate diameter of the pen body makes it comfortable for both men and women to hold.
• The pen body features tight seams, a smooth, burr-free acrylic finish, and gold-plated components that resist oxidation and fading, balancing aesthetics and durability.

✍️ Nib and Writing Experience: Multiple sizes available to suit various scenarios

Exposed Nib Design: Utilizes a stainless steel nib plated with gold-plated brass, engraved with a classic pattern. Available in F (approx. 0.5mm) and M (approx. 0.7mm) sizes to suit different writing needs:

• F Nib: Universal for calligraphy practice and everyday writing, highly smooth, compatible with all inks;
• M Nib: Suitable for English writing, signatures, and bold handwriting practice, with even ink flow.

The nib is smooth and doesn't scratch the paper. The finely polished iridium tip offers moderate resistance, suitable for beginners practicing calligraphy and also meeting the writing feel needs of more advanced users.

📦 Product Specifications and Package Information

Brand: MAJOHN (MoonMan)

Model: C5 "Grand Slam"

Ink Filling Method: Press-type piston vacuum filling

Material: High-transparency acrylic barrel + gold-plated metal ring + stainless steel gold-plated brass nib

Nipple Specifications: F (0.5mm) / M (0.7mm)

Closure Method: Screw cap

💡 Usage and Maintenance Guide

Ink Filling Method: Completely immerse the pen nib in ink and repeatedly press the piston at the end to use vacuum suction to fill the ink. After filling, gently wipe any remaining ink from the nib with a tissue to avoid staining your hands or notebook.

Ink Selection: Preferably use dye-based or colored inks. Long-term use of carbon ink is not recommended as it may clog the piston and capillary structure.

Routine maintenance: Clean the pen regularly (once a month is recommended), rinse the barrel and piston with clean water, and let it dry before inking; avoid dropping and exposure to high temperatures to prevent deformation of the acrylic material.