double side Grey Board 70*100cm Sheets 1mm 2mm 3mm Straw Board Paper Kappa Board for Boxes

Jul 19, 2025

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Premium Double-Sided Grey Board & Straw Kappa Board for Industrial-Grade Packaging Solutions

Crafted for demanding packaging applications, our double-sided grey board and straw kappa board sheets (70x100cm) deliver uncompromising structural integrity. Available in precision-engineered thicknesses (1mm, 1.5mm, 2mm, 2.5mm, 3mm), these boards merge rigidity with workability to solve critical challenges in luxury packaging, retail displays, and protective shipping.

Double-sided grey board 70x100cm sheets in 1mm to 3mm thicknesses for rigid packaging

Premium straw kappa board with smooth dual surfaces for luxury box production

Industrial-strength 70x100cm grey board sheets ideal for heavy-duty shipping containers

Precision-calibrated 1mm-3mm boards for high-end retail displays and protective packaging

Engineering Excellence

Dual-Surface Uniformity: Smooth finish on both sides enables premium printing/foiling without warping.

Layered Composition: High-density grey core + straw/kappa outer layers resist compression and humidity.

Precision Calibration: ±0.05mm thickness tolerance ensures die-cutting consistency.

Performance-Driven Applications

Thickness	Weight (GSM)	Optimal Use Cases	Industry Standards
1.0mm	800-850 GSM	Folding cartons, cosmetic sleeves, paperback covers	FEFCO 0203
1.5mm	1100-1200 GSM	Gift boxes, electronics inserts, drawer dividers	ASTM D5639
2.0mm	1500-1600 GSM	Luxury rigid boxes, display pedestals, bookbinding	ISO 535
2.5mm	1800-1900 GSM	Heavy-duty shipping crates, industrial parts packaging	ISTA 3A
3.0mm	2200-2300 GSM	Automotive component packaging, exhibition structures	MIL-STD-2073

Material Advantages by Scenario

1. Luxury Rigid Boxes (2.0-2.5mm)

Holds metallic foils/debossing without fiber tear

92+ Bendtsen smoothness rating for UV coating adhesion

Withstands 18kg stacking force (72hr test)

2. Retail Displays (1.5-2.0mm)

V-cut folding stability at 0.5mm groove depth

Flame retardant options (Class B1 DIN 4102)

Compatible with latex/eco-solvent printing

3. Protective Shipping (3.0mm)

Edge crush resistance: 18-22 kN/m

Moisture barrier: <5% water absorption (24hr immersion)

Passes 1.8m drop tests (ISTA Procedure 1A)

4. Specialty Applications

Archival Storage: pH-neutral kappa variant (7.8-8.5)

Food Contact: FDA-compliant virgin pulp version

Magnetic Closure: Ferrous particle-infused boards

Eric Zhang | Songhong Paper
📱 WhatsApp: +86 189 3351 0249
📧 Email: 03@songhongpaper.com

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