The grammage (g/m²) of cultural paper is not directly related to its quality. However, within the same type of paper, a higher grammage generally means it is thicker, stiffer, and offers a better user experience. Grammage is an indicator of paper thickness and the amount of material used, while "quality" involves comprehensive properties such as whiteness, smoothness, fiber uniformity, folding endurance, and environmental friendliness. The two cannot be simply equated.
Grammage ≠ Quality: The key difference lies in the premise of "same type"
Same type of paper (e.g., all 80g offset paper): Paper with the same grammage but different brands or batches can have significant quality differences due to variations in raw materials (wood pulp ratio), production processes, and additives (such as fluorescent whitening agents). For example, paper with a high wood pulp content is more flexible and less prone to yellowing, while paper with excessive fillers may be brittle and easily torn.
Different types of paper: Grammage alone cannot determine quality. For example, while 350g grey board paper is thick, its uses and texture are completely different from 105g coated paper, making a direct comparison of "quality" impossible.
How does grammage affect user experience and "perceived quality"?
Although grammage does not equal intrinsic quality, it directly affects the user's actual experience, thus forming an intuitive judgment of "quality":
70g/m²: Lightweight and economical, suitable for drafts and internal documents. However, double-sided printing is prone to bleed-through, and it feels thin, easily perceived as "average quality."
80g/m²: Known as the "golden grammage for office use," it has good stiffness and is less prone to ink bleed-through, suitable for formal documents such as contracts and resumes, and is generally considered "reliable quality."
100g/m² and above: Thick and textured, used for color printing and brochure inner pages, giving a "high-end, professional" quality feel.
Core Indicators Truly Determining the Quality of Cultural Paper
Besides grammage, the following physical and safety/hygiene indicators better reflect the true quality of paper:
Whiteness and Gloss: Affects visual comfort; excessively high gloss (>90%) may indicate the addition of excessive fluorescent whitening agents, which can harm the eyes with prolonged use.
Smoothness: Determines the uniformity of ink transfer during printing, affecting the clarity of images and text.
Tensile Strength and Folding Endurance:Reflects the durability of paper; high strength means it is less prone to tearing during printing and reading.
Safety and Hygiene Indicators: Environmental standard HJ 410-2017 strictly limits the release of heavy metals such as lead and cadmium, formaldehyde, and VOCs. Only paper that meets this standard is truly safe and reliable.
