150g Butter Paper Super Heavy for Archival Wraps and Structural Crafts
Product Details
| Basis Weight: | 130 G/m² | Transparency: | 58% |
|---|---|---|---|
| Tearing Resistance: | 400 MN | MD Stretch: | 4.5% |
| Tensile MD: | 4.8 KN/m | Tensile CD: | 3.0 KN/m |
Product Description
150 g/m² butter paper is a super‑heavyweight grade (basis weight tolerance ±5%) used for archival wrapping of fragile documents, rigid structural crafts, and die‑cut templates. Transparency is approx. 55% (interpolated), providing a frosted glass effect. Exceptional tear resistance (≥450 mN) and low stretch (MD 4.5%) ensure long‑term dimensional stability, making it ideal for preservation and repeated handling.
Technical Specifications (Interpolated from 120g and 200g data)
| Parameter | Unit | Value |
|---|---|---|
| Basis Weight | g/m² | 150 (±5%) |
| Transparency | % | ≥55 |
| Tearing Resistance | mN | ≥450 |
| Smoothness (Bekk) | s | ≥7 |
| Machine Direction Stretch | % | 4.5 |
| Cross Direction Stretch | % | 15.0 |
| Sizing Degree | mm | ≥1.5 |
| Moisture Content | % | 7.0±1.0 |
Process Introduction
150g paper requires a specialized approach with extended beating (≥95°SR) to maintain translucency at high basis weight. Multiple refining passes ensure full fiber hydration. The web is formed on a cylinder or slow Fourdrinier machine. Pressing uses graduated pressure to avoid fiber crushing. Drying is carried out in multiple zones (60‑80°C, then 80‑100°C). Semi‑dry calendering at 130 kN/m is followed by surface sizing with formaldehyde‑free biological glue. Final moisture carefully balanced to 6‑8% to prevent edge curl.
Applications & Advantages by Category
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Archival Wrapping – Acid‑free, protects ancient maps, manuscripts, and photographs from light and dust.
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Structural Crafts – Foldable enough for 3D geometric lamps, yet rigid enough to hold shape.
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Die‑Cut Templates – Heavy weight resists tearing when cutting around complex shapes.
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Transparent Partition Sheets – For museum display or office dividers with frosted aesthetic.
Why Choose This Paper
150g offers near‑board strength with translucent beauty – perfect for preservation specialists and advanced crafters.
Product Highlights
150 g/m² butter paper is a super‑heavyweight grade (basis weight tolerance ±5%) used for archival wrapping of fragile documents, rigid structural crafts, and die‑cut templates. Transparency is approx. 55% (interpolated), providing a frosted glass effect. Exceptional tear resistance (≥450 mN) and low ...
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