70g Natural Color Cotton Fiber Paper for Ancient Book Restoration and Calligraphy
This 70 g/㎡ natural color cotton fiber paper is crafted for archival restoration, calligraphy, and traditional painting. Made from pure bast fiber (paper mulberry) without bleaching, it is acid‑free, durable, and age‑resistant. High folding endurance (≥500 times) and low shrinkage make it suitable for binding rare books and repairing ancient scrolls.
| Parameter | Unit | Value |
|---|---|---|
| Basis Weight | g/m² | 70 (±4) |
| Thickness | mm | 0.13‑0.16 |
| Tensile Strength (MD) | kN/m | ≥4.5 |
| Tear Strength | kN/m | ≥6.0 |
| Folding Endurance | times | ≥500 |
| Air Permeability | μm/Pa·s | ≤2.5 |
| Moisture Content | % | 6.5‑7.2 |
| pH Value | — | Neutral (7.0‑7.5) |
| Color | Natural cream |
100% bast fiber (paper mulberry bark) – traditional raw material. Lime cooking, hand‑beating or low‑speed refining to preserve long fibers (3‑5 mm). Sheet forming on cylinder paper machine with low speed. No bleaching, no optical brighteners. Air‑dried or low‑temperature drying (70‑80°C) to maintain flexibility. No calendering – natural rough texture.
Ancient Book Restoration – Acid‑free and flexible; matches aged paper texture.
Calligraphy & Painting – Excellent ink absorption and color blending; used for Chinese brush painting.
Rubbing & Printing – High strength withstands repeated rubbing.
Religious Scripture Copying – Traditional paper for sutra transcription.
70g natural cotton paper preserves cultural heritage; museum‑grade archival quality.
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