300g 350g 400g Duplex Board Grey Back Paper Price for Gift Box

• Customization: Available
• Feature: Greaseproof
• Usage: Box and Carton
• Coating Material: Kaolinite
• Paper Type: Duplex Board
• Weight: 230-450g
• Coating Side: Single Side
• Quality: A
• Decorative Pattern: Matt Coated Paper
• Gloss: Semigloss Paper
• Pulp Style: Recycled
• Substance: 230-450GSM
• Colour: Grey Back, White Back
• Caliper: 290-570um
• Whiteness: 80% ISO
• Cobb Coating Side: 50G/M2
• Cobb Uncoating Side: 100G/M2
• Stiffness: 50-220g*Cm
• Smoothness: 70s
• Moisture: 6-8%
• Size: Sheets & Reels OEM
• Transport Package: Standard Export Packing
• Specification: ISO
• Trademark: Tianhong
• Origin: China
• HS Code: 48003200
• Production Capacity: 3000 Tons Per Month

Product Description

Specification

Name	Clay Coated Duplex Cardboard Grey Back
Basis weight	230, 250, 300, 350, 400, 450 g/m2
Size	60*90cm, 61*86cm, 70*100cm and customized sizes in sheets or in jumbo reels
Coating	clay coated one side
Paper color	top white grey back
Quality	recycled
Applications	for carton, box and hand bag production

Product Description

 Duplex Cardboard 

Clay Coated Duplex Cardboard Grey Back is a premium double-layer paperboard featuring a clay-coated surface for vibrant printing and a sturdy grey back. Ideal for luxury packaging, gift boxes, and high-end printed products, it offers excellent durability, rigidity, and moisture resistance.

Parameters	Unit	Value
Basis weight	g/m2	230-450
Caliper	um	270-560
Whiteness	%	≥85
Surface glossy	%	≥40
Smoothness	sec	≥70
COBB	g/m2	≤50
Moisture	%	6-8
Printing intensity	m/s	≥1.2
Ink absorbent	%	25
Folding resistant	times	≥10

Applications

 luxury gift boxes, high-end packaging, shopping bags, book covers, and other premium products.

Packing & Delivery

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Company Profile

FAQ

Contact us for bulk discounts

1. How can we prevent the effects of humidity on our products? 

Store in a dry, room-temperature environment, away from rain.

2. Can you offer custom production or labeling services? 

We accept custom weights and specifications, and can also affix custom logos.