What Is Offset Paper (Uncoated Woodfree)?
Offset paper (also known as woodfree uncoated paper or bond paper) features a natural, non-coated fibrous surface with open paper pores. It is engineered specifically for exceptional ink absorption, crisp text legibility, and effortless handwriting receptivity. Without a synthetic gloss coating, offset paper provides a soft, warm tactile feel and a glare-free viewing experience.
Offset paper is the primary choice for trade novels, 紀要, ノートブック, プランナー, school textbooks, technical training manuals, and legal documents where long reading sessions and handwriting comfort are essential.
Pure White Woodfree Paper
Bleached chemical wood pulp with zero lignin. Crisp black text contrast and clean line work for textbooks, ノンフィクション, and corporate manuals.
クリーム / Warm Book Paper
Soft, unbleached cream tone that eliminates harsh light glare. Specially formulated for extended reading sessions in novels, 詩, and memoirs.
Post-Consumer Recycled Offset
Sustainable recycled paper fibers with a gentle organic tooth. Meets global environmental publishing requirements with low carbon footprint.
主な特長 & 利点
- Superior Text Legibility: Low-reflection matte surface prevents eye strain under artificial office light and direct sunlight.
- Natural Organic Hand Feel: Tactile paper tooth provides a warm, authentic literary impression.
- 100% Handwriting-Friendly: Absorbs ink rapidly without smearing, making it ideal for gel pens, ballpoint pens, fountain pens, and pencils.
- Balanced Opacity: High-opacity formulations minimize show-through on double-sided text printing.
- Wide Caliper Range: Available from lightweight 70 GSM up to sturdy 200 GSM for diverse publishing applications.
Common Applications of Offset Paper
Trade Novels & Literature
The standard for trade paperbacks, hardcover fiction, poetry books, and memoirs where extended reading comfort is paramount.
ノートブック, ジャーナル & プランナー
Smooth write-on surface designed for daily journaling, バレットジャーナル, executive diaries, and sketchbooks.
教科書 & Training Manuals
耐久性, glare-free paper supporting dense typography, line art schematics, and clean margin annotations.
ワークブック & Activity Sheets
Essential for educational workbooks, ぬりえ, test forms, and questionnaires where users fill in answers directly.
オフセット紙: Weight and Caliper Table
| 坪量 (GSM) | Equivalent US Basis (ポンド) | Caliper Thickness (μメートル) | Common Applications |
|---|---|---|---|
| 70 GSM | 47 lb Text | 85 μメートル | High-page-count Bibles, dictionaries, bulky reference manuals. |
| 80 GSM | 54 lb Text | 95 μメートル | Standard trade paperbacks, 小説, 教科書, office printing. |
| 100 GSM | 67 lb Text | 115 μメートル | Executive journals, プレミアムノートブック, high-opacity non-fiction. |
| 120 GSM | 80 lb Text | 140 μメートル | Art journals, illustrated workbooks, sketchbook leaves. |
| 140 GSM | 94 lb Text | 165 μメートル | Heavyweight drawing pads, ぬりえ, deluxe endpapers. |
| 160 GSM | 108 lb Text | 185 μメートル | Hardcover endpapers, flashcards, certificate inserts. |
| 180 GSM | 122 lb Text | 215 μメートル | Heavy divider cards, invitation inserts, presentation backing. |
| 200 GSM | 135 lb Text / 74 lb Cover | 240 μメートル | Softcover book covers, promotional reply cards, folder jackets. |
Offset Paper vs. Coated Paper Comparison
| Performance Dimension | オフセット紙 (コーティングされていない) | コート紙 (アートペーパー) |
|---|---|---|
| Surface Texture | Natural, fibrous tooth with open pores | スムーズ, non-porous coated barrier |
| Printing Specialization | Sharp black/mono text, line art, 図 | High-density full-color photos and illustrations |
| Writing Performance | Excellent (absorbs ink smoothly, zero smudging) | Poor (smooth surface repels ink, easy to smear) |
| Light Reflection | Zero glare, comfortable for extended reading | Gloss reflects light; Matte provides softer reflection |
| Primary Products | 小説, 雑誌, 教科書, ワークブック | アートブック, フォトブック, カタログ, 雑誌 |