Paper grammage, also known as GSM (grams per square meter) or basis weight, refers to the weight of one square meter of paper, measured in grams per square meter (g/m²). It is a fundamental indicator of paper density and thickness:
- Low grammage (e.g., 35–70 g/m²): Thin, lightweight paper (e.g., newsprint, tissue paper).
tissue jumbo roll
- High grammage (e.g., >300 g/m²): Thick, rigid board-like materials (e.g., packaging boxes, premium cards).
corrugated paper roll
This metric directly influences the paper’s mechanical properties (stiffness, durability) and suitability for specific applications.
Classification by Grammage and Applications
Papers are categorized into four tiers based on grammage, each with distinct uses and price ranges:
| Grammage Range | Paper Types | Primary Applications | Price Range (Relative) |
|---|---|---|---|
| 35–70 g/m² | Newsprint, tissue, copy paper | Newspapers, flyers, low-cost notebooks | $– (Low cost) |
| 80–150 g/m² | Book paper, offset paper | Books, magazines, office documents | $$ (Mid-range) |
| 150–300 g/m² | Coated paper, matte paper, cardstock | Covers, business cards, brochures | $$$ (Premium) |
| >300 g/m² | Whiteboard, grayboard, art board | Luxury packaging, hardcover books, folders | $$$$ (High-end) |
Notes:
- Price factors: Higher grammage requires more raw material, increasing cost (e.g., 300 g/m² board is 30–50% pricier than 150 g/m² equivalents). Specialty finishes (e.g., pearl luster, embossing) further elevate costs.
- Performance trade-offs: Low-grammage papers prioritize cost efficiency; high-grammage papers emphasize durability and premium aesthetics.
3. Grammage in Printing and Production
- Printing compatibility:
- Low grammage (≤70 g/m²): Unsuitable for heavy ink coverage (e.g., art books); prone to wrinkling.
- High grammage (≥200 g/m²): Ideal for CMYK-rich designs (e.g., catalogs), but requires specialized printers.
- Environmental impact: Lightweight papers (≤80 g/m²) reduce shipping costs and carbon footprint.
YYS Sawing Machines: Precision Cutting for All Grammages
YYS (Youyuansheng Machinery) offers CNC band saw paper cutters engineered to handle papers across the grammage spectrum:
- Efficiency:
- Low grammage (e.g., 50 g/m²): Cuts at ≥3 rolls/hour due to minimal resistance.
- High grammage (e.g., 400 g/m²): Slower cutting (1–2 rolls/hour) but maintains ±0.3mm precision.
- Durability considerations:
- Blades require resharpening after 80 cuts for low grammage but only ~30 cuts for heavy boards due to accelerated wear.
- Custom solutions:
- Machines support rolls from 60cm–1.5m diameter and grammages 30–500 g/m², with voltage/power customization (e.g., 380V 3phases).
Selecting the Right Sawing Machine
- Low-volume, versatile needs: Opt for standard models (e.g., YYS-BSP80S-T1500) handling ≤250 g/m².
- High-volume, heavy-duty demands: Choose industrial-grade cutters (e.g., YYS-I Series) with reinforced blades for >300 g/m² boards.
- Cost-saving tip: For mixed grammage workflows, prioritize machines with auto-grinding blades to reduce downtime.
Conclusion
Grammage dictates paper’s role—from ephemeral flyers to heirloom packaging. YYS’s adaptable sawing technology ensures precision across this spectrum, though blade wear and speed must align with grammage demands. By matching machine capabilities to production needs (e.g., prioritizing speed for lightweight papers or durability for cardstock), manufacturers optimize both efficiency and cost.