In daily printing, many people overlook a crucial detail-paper grammage-yet it is precisely the core factor influencing print clarity, texture, and even equipment lifespan. A common misconception is that "grammage" refers to the weight of a single sheet of paper. In reality, the standard definition of paper grammage is "the weight per square meter of paper" (unit: g/㎡). For example, the commonly used 70g paper means that 1 square meter of this paper weighs 70 grams. Grammage directly corresponds to the paper's thickness, stiffness, and load-bearing capacity: the higher the grammage, the thicker and more durable the paper.
I. Suitable Scenarios for Different Grammages: Choose Precisely to Avoid Waste
1. Daily Office: 70g-80g Offset Paper (All-Purpose Choice)
This is the "universal option" for office settings and the most compatible basic specification for printers. 70g paper, with moderate thickness and good flexibility, is ideal for printing ordinary documents, meeting minutes, and internal reports. It offers excellent cost-effectiveness and rarely causes paper jams or curling. 80g paper is slightly thicker than 70g, with better stiffness-perfect for printing contracts, external correspondence, resumes, or other documents requiring a more formal appearance. Both are compatible with most household and office inkjet/laser printers, requiring no additional settings.
2. Promotional Materials: 100g-120g Coated Paper/Matt Coated Paper
For printing flyers, product brochures, leaflets, or other external materials, 100g-120g coated paper or matt coated paper is recommended. These papers have a smooth surface that better absorbs ink, resulting in more vivid colors and clearer image details. Compared to ordinary offset paper, they significantly enhance the professionalism and visual impact of materials. Coated paper has a higher gloss, suitable for designs emphasizing vibrant colors; matt coated paper is non-reflective, offering a more comfortable reading experience for text-heavy brochures.
3. Rigidity Requirements: 200g+ Coated Paper/Specialty Paper
For business cards, posters, calendar pages, invitations, or other prints requiring high stiffness and wear resistance, select thick paper with grammage above 200g. Common specifications include 200g, 250g, 300g coated paper, or specialty papers with unique textures (e.g., kraft paper, art paper). These papers are rigid, providing excellent shaping effects and durability for three-dimensional designs or frequent flipping. However, note that ordinary household printers have narrow paper feed paths and typically only support paper ≤160g. When using paper above 200g, confirm if your printer has a "Thick Paper Mode" or use industrial printers at professional print shops to avoid paper jams, feeding failures, or damage to printer toner cartridges/printheads.
II. Hidden Tips to Avoid "Invisible Printing Pitfalls"
1,Grammage is independent of size: Paper of the same grammage maintains consistent thickness and texture regardless of being cut into A4, A5, or other sizes-there's no need to reduce grammage for smaller sizes.
2,Compatibility differences between printing technologies: Laser printers, with high-temperature fusing technology, are more suitable for thick paper and less prone to ink peeling. When printing thick paper with inkjet printers, enable "Thick Paper Mode" to extend drying time and prevent ink smudging; it's also advisable to use inkjet-specific thick paper (with an ink-absorbing coating).
3,Special requirements for photo printing: Never substitute ordinary thick paper with dedicated photo paper. Photo paper typically has a grammage of 230g-300g and features a special color-reproduction coating for finer image quality and more realistic colors. Always select the corresponding "paper type" (e.g., glossy, matte) in printer settings to achieve optimal results.
4,Avoid overpursuing high grammage: Higher grammage isn't always better. For example, using 120g paper for mass daily document printing not only increases costs but may also cause frequent paper jams due to excessive thickness, reducing printing efficiency.
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