When selecting paperboard for premium packaging, many buyers focus on GSM However, another equally important specification is thickness, often measured in microns (μm) or millimeters (mm). While GSM indicates the weight of the paperboard, thickness determines its rigidity, stiffness, and overall performance during printing, die-cutting, folding, and packaging. For industries such as cosmetics, pharmaceuticals, electronics, toys, and food packaging, choosing the correct Ivory Board thickness ensures both product protection and an attractive appearance.
What Is Ivory Board?
Ivory Board, also known as C1S (Coated One Side) Ivory Board, is a premium-grade paperboard featuring a coated white surface on one side and a smooth, printable finish. It offers high brightness, excellent stiffness, outstanding printability, and reliable folding performance, making it an ideal choice for high-quality packaging. Ivory Board is widely used for cosmetic boxes, pharmaceutical cartons, food packaging, greeting cards, luxury shopping bags, and various consumer product packaging that requires an attractive appearance and durable performance.
Understanding GSM vs Thickness
GSM measures the weight of one square meter of paperboard, while thickness refers to the physical distance between the two surfaces, usually measured in microns (μm) or millimeters (mm). Although GSM and thickness are closely related, they are not the same. Two Ivory Boards with the same GSM may have different thicknesses due to differences in fiber quality, pulp composition, coating formulation, bulk, and manufacturing technology. Therefore, both GSM and thickness should be considered when selecting the right paperboard for packaging and printing applications.
| Basis Weight (GSM) | Approx. Thickness (μm / mm) | Typical Applications |
|---|---|---|
| 170 gsm | 205–220 μm (0.21 mm) | Book covers, inserts |
| 190 gsm | 230–245 μm (0.24 mm) | Manuals, folders |
| 210 gsm | 255–270 μm (0.26 mm) | Small cartons |
| 230 gsm | 280–295 μm (0.29 mm) | Cosmetic packaging |
| 250 gsm | 305–320 μm (0.31 mm) | Medicine boxes |
| 300 gsm | 360–380 μm (0.37 mm) | Premium packaging |
| 350 gsm | 425–445 μm (0.44 mm) | Luxury gift boxes |
| 400 gsm | 490–510 μm (0.50 mm) | Heavy-duty packaging |
Ivory Board thickness directly affects the strength, durability, and overall performance of packaging. A thicker board offers better rigidity, higher compressive strength, improved print quality, and superior folding performance. It also helps minimize cracking during die-cutting and creasing while providing a stable surface for premium finishing techniques such as embossing, UV coating, hot foil stamping, and lamination. Choosing the appropriate thickness ensures that the packaging meets both functional requirements and aesthetic expectations.
Recommended GSM
Cosmetics: 250–350 gsm
Pharmaceuticals: 250–300 gsm
Food Packaging: 210–300 gsm
Luxury Packaging: 350–400 gsm
How to Choose the Right Ivory Board
When selecting Ivory Board, consider factors such as product weight, packaging design, printing requirements, transportation conditions, and the desired finishing effects. Choosing the appropriate combination of GSM and thickness helps ensure sufficient strength, excellent print quality, reliable folding performance, and efficient material utilization. The right specification not only protects the product during storage and shipping but also enhances packaging appearance while optimizing overall production costs.
Why Choose China Paper?
China Paper supplies high-quality C1S Ivory Board made from 100% virgin wood pulp, offering excellent stiffness, smooth surface, high brightness, and consistent quality for superior printing performance. Our Ivory Board is available in a wide range from 170–400 gsm, making it suitable for various packaging applications, including cosmetic boxes, pharmaceutical cartons, food packaging, and premium retail packaging. The material performs well in offset printing and is compatible with multiple finishing processes such as UV coating, lamination, embossing, and die-cutting. FSC-certified options are available upon request, supporting sustainable and environmentally responsible packaging solutions.
Conclusion
Understanding the relationship between GSM and thickness is essential for selecting the right Ivory Board for packaging applications. While GSM defines the weight and density of the board, thickness directly influences rigidity, durability, and overall packaging performance. Whether used for cosmetics, pharmaceuticals, food, or luxury packaging, choosing the correct specification helps improve product protection, visual appeal, and production efficiency while ensuring a better balance between cost and performance.
FAQ
Q1: What is the thickness of 300 gsm Ivory Board?
A: Approximately 360–380 μm.
Q2: Is GSM the same as thickness?
A: No. GSM measures weight, while thickness measures physical depth.
Q3: What GSM is best for cosmetic packaging?
A: Typically 250–350 gsm.
Q4: Can Ivory Board be used for food packaging?
A: Yes, food-grade Ivory Board is widely used for bakery and takeaway packaging.
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