80g Butter Paper Robust General Grade for CAD Printing and Plate Making
80 g/m² butter paper offers enhanced thickness (approx. 0.08‑0.09 mm) and tearing resistance (≥220 mN) while maintaining transparency around 66%. It is the recommended weight for high‑speed laser printing and electrostatic copying, where lower jam rates are critical. Also ideal for screen printing plate making and rigid packaging inserts.
Technical Specifications (Interpolated from 75g and 90g data)
| Parameter | Unit | Value |
|---|---|---|
| Basis Weight | g/m² | 80 (±5%) |
| Transparency | % | ≥66 |
| Tearing Resistance | mN | ≥220 |
| Smoothness (Bekk) | s | ≥16 |
| Machine Direction Stretch | % | 4.0 |
| Cross Direction Stretch | % | 12.0 |
| Sizing Degree | mm | ≥1.5 |
| Moisture Content | % | 7.0±1.0 |
Process Introduction
Higher basis weight demands more intensive beating to maintain transparency. After ≥90°SR refining, the stock is formed on a Fourdrinier machine at low consistency. Light pressing avoids crushing fibers. Primary drying at 60‑80°C ensures even shrinkage. Semi‑dry calendering with linear pressure 100‑120 kN/m at 12‑15% moisture closes surface pores. Surface sizing with PVA and stearic acid starch creates a strong barrier. Secondary drying to 6‑8% moisture, then finishing calendering to achieve smoothness ≥300s.
Applications & Advantages by Category
- CAD Laser Printing – Thicker paper reduces jamming in high‑speed laser printers; crisp text and lines.
- Screen Printing Plate Making – Stable under tension; excellent ink resistance for stencil preparation.
- Offset Printing Proofs – Translucent base for film replacement and color proofing.
- Packaging Inserts – Rigid enough for luxury box dividers; adds translucent elegance.
Why Choose This Paper – 80g provides extra stiffness and durability for printing and industrial plate making without sacrificing too much transparency.
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